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<!--Copyright (C) 2002-2006 Unimod; this information may be copied, distributed and/or-->
<!--modified under certain conditions, but it comes WITHOUT ANY WARRANTY; see the-->
<!--accompanying Design Science License for more details-->
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      <umod:elem title="Li" full_name="Lithium" avge_mass="6.941" mono_mass="7.016003"/>
      <umod:elem title="C" full_name="Carbon" avge_mass="12.0107" mono_mass="12"/>
      <umod:elem title="13C" full_name="Carbon13" avge_mass="13.00335483"
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      <umod:elem title="N" full_name="Nitrogen" avge_mass="14.0067" mono_mass="14.003074"/>
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      <umod:elem title="F" full_name="Fluorine" avge_mass="18.9984032" mono_mass="18.99840322"/>
      <umod:elem title="Na" full_name="Sodium" avge_mass="22.98977" mono_mass="22.9897677"/>
      <umod:elem title="P" full_name="Phosphorous" avge_mass="30.973761" mono_mass="30.973762"/>
      <umod:elem title="S" full_name="Sulfur" avge_mass="32.065" mono_mass="31.9720707"/>
      <umod:elem title="Cl" full_name="Chlorine" avge_mass="35.453" mono_mass="34.96885272"/>
      <umod:elem title="K" full_name="Potassium" avge_mass="39.0983" mono_mass="38.9637074"/>
      <umod:elem title="Ca" full_name="Calcium" avge_mass="40.078" mono_mass="39.9625906"/>
      <umod:elem title="Fe" full_name="Iron" avge_mass="55.845" mono_mass="55.9349393"/>
      <umod:elem title="Ni" full_name="Nickel" avge_mass="58.6934" mono_mass="57.9353462"/>
      <umod:elem title="Zn" full_name="Zinc" avge_mass="65.409" mono_mass="63.9291448"/>
      <umod:elem title="Se" full_name="Selenium" avge_mass="78.96" mono_mass="79.9165196"/>
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      <umod:elem title="Ag" full_name="Silver" avge_mass="107.8682" mono_mass="106.905092"/>
      <umod:elem title="Hg" full_name="Mercury" avge_mass="200.59" mono_mass="201.970617"/>
      <umod:elem title="Au" full_name="Gold" avge_mass="196.96655" mono_mass="196.966543"/>
      <umod:elem title="I" full_name="Iodine" avge_mass="126.90447" mono_mass="126.904473"/>
      <umod:elem title="Mo" full_name="Molybdenum" avge_mass="95.94" mono_mass="97.9054073"/>
      <umod:elem title="Cu" full_name="Copper" avge_mass="63.546" mono_mass="62.9295989"/>
      <umod:elem title="e" full_name="electron" avge_mass="0.000549" mono_mass="0.000549"/>
      <umod:elem title="B" full_name="Boron" avge_mass="10.811" mono_mass="11.0093055"/>
      <umod:elem title="As" full_name="Arsenic" avge_mass="74.9215942" mono_mass="74.9215942"/>
   </umod:elements>
   <umod:modifications>
      <umod:mod title="Acetyl" full_name="Acetylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2008-02-15 05:20:02"
                approved="1"
                record_id="1">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="6"/>
         <umod:specificity hidden="0" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Multiple"
                           spec_group="2">
            <umod:misc_notes>GIST acetyl light</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Multiple"
                           spec_group="1">
            <umod:misc_notes>PT and GIST acetyl light</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="7">
            <umod:misc_notes>O-acetyl</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                           spec_group="8"/>
         <umod:delta mono_mass="42.010565" avge_mass="42.0367" composition="H(2) C(2) O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>14730666</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15350136</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0055</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>IonSource acetylation tutorial</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.ionsource.com/Card/acetylation/acetylation.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Chemical Reagents for Protein Modification 3rd edition, pp 215-221, Roger L. Lundblad, CRC Press, New York, N.Y., 2005</umod:text>
            <umod:source>Book</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11999733</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0043</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0044</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0354</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0045</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0056</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0046</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0051</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0052</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0364</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0041</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0049</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0048</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0047</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12175151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0042</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0050</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0053</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0054</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>ACET</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PNAS 2006 103: 18574-18579</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1073/pnas.0608995103</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Amidated" full_name="Amidation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-14 08:10:18"
                approved="1"
                record_id="2">
         <umod:specificity hidden="0" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="0" site="C-term" position="Any C-term" classification="Artefact"
                           spec_group="2"/>
         <umod:delta mono_mass="-0.984016" avge_mass="-0.9848" composition="H N O(-1)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0100</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0099</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0098</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0097</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0096</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0095</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0094</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0093</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0092</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0091</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0090</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0089</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0081</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0082</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0083</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0084</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0085</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0086</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0087</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0088</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AMID</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Biotin" full_name="Biotinylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:27:08"
                approved="1"
                record_id="3">
         <umod:specificity hidden="0" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="226.077598" avge_mass="226.2954"
                     composition="H(14) C(10) N(2) O(2) S">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0117</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>BIOT</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Carbamidomethyl" full_name="Iodoacetamide derivative"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 10:18:27"
                approved="1"
                record_id="4">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Artefact"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Artefact"
                           spec_group="6"/>
         <umod:delta mono_mass="57.021464" avge_mass="57.0513" composition="H(3) C(2) N O">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Carboxyamidomethylation</umod:alt_name>
         <umod:xref>
            <umod:text>Creasy, D. M., Cottrell, J. S., Proteomics 2 1426-34 (2002)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11510821</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Boja, E. S., Fales, H. M., Anal. Chem. 73 3576-82 (2001)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12422359</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Carbamyl" full_name="Carbamylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:09:40"
                approved="0"
                record_id="5">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Artefact"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Artefact"
                           spec_group="3"/>
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Multiple"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Multiple"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="Artefact"
                           spec_group="5"/>
         <umod:delta mono_mass="43.005814" avge_mass="43.0247" composition="H C N O">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0343</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12203680</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0332</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>IonSource carbamylation tutorial</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.ionsource.com/Card/carbam/carbam.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>10978403</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Carbamylation is an irreversible process of non-enzymatic modification of proteins by the breakdown products of urea isocyanic acid reacts with the N-term of a proteine or side chains of lysine and arginine residues</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Carboxymethyl" full_name="Iodoacetic acid derivative"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 10:21:50"
                approved="1"
                record_id="6">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Artefact"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="4">
            <umod:misc_notes>Hydroxylethanone</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="58.005479" avge_mass="58.0361" composition="H(2) C(2) O(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>Carboxymethylation</umod:alt_name>
      </umod:mod>
      <umod:mod title="Deamidated" full_name="Deamidation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:11:50"
                approved="0"
                record_id="7">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="2">
            <umod:misc_notes>Protein which is post-translationally modified by the de-imination of one or more arginine residues; Peptidylarginine deiminase (PAD) converts protein bound to citrulline</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="N" position="Anywhere" classification="Artefact"
                           spec_group="1">
            <umod:misc_notes>Convertion of glycosylated asparagine residues upon deglycosylation with PGNase F in H2O</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="Q" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="F" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="3"/>
         <umod:delta mono_mass="0.984016" avge_mass="0.9848" composition="H(-1) N(-1) O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>phenyllactyl from N-term Phe</umod:alt_name>
         <umod:alt_name>Citrullination</umod:alt_name>
         <umod:xref>
            <umod:text>IonSource tutorial</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.ionsource.com/Card/Deamidation/deamidation.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>CITR</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FLAC</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0128</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0214</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>6838602</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15700232</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DEAM</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICAT-G" full_name="Gygi ICAT(TM) d0" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 17:00:43"
                approved="1"
                record_id="8">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="486.251206" avge_mass="486.6253"
                     composition="H(38) C(22) N(4) O(6) S">
            <umod:element symbol="H" number="38"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>10504701</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Gygi S.P., et. al. Nat Biotechnol. 1999 Oct;17(10):994-9</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICAT-G:2H(8)" full_name="Gygi ICAT(TM) d8" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 17:01:35"
                approved="1"
                record_id="9">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="494.301420" avge_mass="494.6746"
                     composition="H(30) 2H(8) C(22) N(4) O(6) S">
            <umod:element symbol="H" number="30"/>
            <umod:element symbol="2H" number="8"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>10504701</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Gygi S.P., et. al. Nat Biotechnol. 1999 Oct;17(10):994-9</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Met-&gt;Hse" full_name="Homoserine" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-13 15:40:08"
                approved="1"
                record_id="10">
         <umod:specificity hidden="0" site="M" position="Any C-term" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="-29.992806" avge_mass="-30.0922" composition="H(-2) C(-1) O S(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:misc_notes>Cyanogen bromide (CNBr) cleavage converts the C-term Met to either homoserine or homoserine lactone, depending on pH.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Met-&gt;Hsl" full_name="Homoserine lactone" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:10:15"
                approved="0"
                record_id="11">
         <umod:specificity hidden="0" site="M" position="Any C-term" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="-48.003371" avge_mass="-48.1075" composition="H(-4) C(-1) S(-1)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Donald Voet, Judith G. Voet (1995): Biochemistry; p 115</umod:text>
            <umod:source>Book</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Cyanogen bromide (CNBr) cleavage converts the C-term Met to either homoserine or homoserine lactone, depending on pH.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="ICAT-D:2H(8)" full_name="Applied Biosystems original ICAT(TM) d8"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 16:56:23"
                approved="1"
                record_id="12">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="450.275205" avge_mass="450.6221"
                     composition="H(26) 2H(8) C(20) N(4) O(5) S">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="2H" number="8"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:Ignore mono_mass="227.085423" avge_mass="227.3033"
                      composition="H(15) C(10) N(2) O(2) S ">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="288.16838" avge_mass="288.4223"
                      composition="H(18) 2H(4) C(13) N(3) O(2) S ">
            <umod:element symbol="H" number="18"/>
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="13"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="332.194594" avge_mass="332.4749"
                      composition="H(22) 2H(4) C(15) N(3) O(3) S ">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="411.288115" avge_mass="411.6092"
                      composition="H(27) 2H(8) C(18) N(4) O(4) S ">
            <umod:element symbol="H" number="27"/>
            <umod:element symbol="2H" number="8"/>
            <umod:element symbol="C" number="18"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="485.270751" avge_mass="485.7109"
                      composition="H(29) 2H(8) C(20) N(4) O(5) S(2) ">
            <umod:element symbol="H" number="29"/>
            <umod:element symbol="2H" number="8"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="2"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="509.270751" avge_mass="509.7323"
                      composition="H(29) 2H(8) C(22) N(4) O(5) S(2) ">
            <umod:element symbol="H" number="29"/>
            <umod:element symbol="2H" number="8"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="2"/>
         </umod:Ignore>
         <umod:xref>
            <umod:text>Structure</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chemsoc.org/exemplarchem/entries/2002/proteomics/images/icat_reagent.gif</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Molecular &amp; Cellular Proteomics 2:428-442, 2003</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.mcponline.org/cgi/content/full/2/7/428</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICAT-D" full_name="Applied Biosystems original ICAT(TM) d0"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 16:53:48"
                approved="1"
                record_id="13">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="442.224991" avge_mass="442.5728"
                     composition="H(34) C(20) N(4) O(5) S">
            <umod:element symbol="H" number="34"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:Ignore mono_mass="227.085423" avge_mass="227.3033"
                      composition="H(15) C(10) N(2) O(2) S ">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="284.143273" avge_mass="284.3977"
                      composition="H(22) C(13) N(3) O(2) S ">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="13"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="328.169488" avge_mass="328.4502"
                      composition="H(26) C(15) N(3) O(3) S ">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="403.237901" avge_mass="403.5599"
                      composition="H(35) C(18) N(4) O(4) S ">
            <umod:element symbol="H" number="35"/>
            <umod:element symbol="C" number="18"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="477.220537" avge_mass="477.6616"
                      composition="H(37) C(20) N(4) O(5) S(2) ">
            <umod:element symbol="H" number="37"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="2"/>
         </umod:Ignore>
         <umod:Ignore mono_mass="501.220537" avge_mass="501.683"
                      composition="H(37) C(22) N(4) O(5) S(2) ">
            <umod:element symbol="H" number="37"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="2"/>
         </umod:Ignore>
         <umod:xref>
            <umod:text>Structure</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chemsoc.org/exemplarchem/entries/2002/proteomics/images/icat_reagent.gif</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Molecular &amp; Cellular Proteomics 2:428-442, 2003</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.mcponline.org/cgi/content/full/2/7/428</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NIPCAM" full_name="N-isopropylcarboxamidomethyl"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 12:39:14"
                approved="1"
                record_id="17">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="99.068414" avge_mass="99.1311" composition="H(9) C(5) N O">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Dimethylacrylamide, DMA</umod:alt_name>
         <umod:xref>
            <umod:text>Krutzsch and Inman, Analytical Biochemistry, 209, 109-116, (1993)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Galvani et.al. (2000) Electrophoresis vol 22 p2046-p2074</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>8465942</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11465505</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PEO-Iodoacetyl-LC-Biotin"
                full_name="Biotinyl-iodoacetamidyl-3,6-dioxaoctanediamine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:40:00"
                approved="0"
                record_id="20">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="414.193691" avge_mass="414.5196"
                     composition="H(30) C(18) N(4) O(5) S">
            <umod:element symbol="H" number="30"/>
            <umod:element symbol="C" number="18"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>Pierce EZ-Link PEO-Iodoacetyl Biotin</umod:alt_name>
         <umod:xref>
            <umod:text>12038753</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>J. Biol. Chem., Vol. 278, Issue 7, 4500-4509, February 14, 2003</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.jbc.org/cgi/content/full/278/7/4500#F1</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>15253424</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Phospho" full_name="Phosphorylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 12:11:24"
                approved="1"
                record_id="21">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="5">
            <umod:misc_notes>Rare</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="3">
            <umod:misc_notes>Rare</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="2">
            <umod:misc_notes>Usually don't see beta elimination of phosphate</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="4">
            <umod:misc_notes>Rare</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="97.976896" avge_mass="97.9952" flag="false"
                              composition="H(3) O(4) P">
               <umod:element symbol="H" number="3"/>
               <umod:element symbol="O" number="4"/>
               <umod:element symbol="P" number="1"/>
            </umod:NeutralLoss>
            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
         </umod:specificity>
         <umod:specificity hidden="0" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
            <umod:NeutralLoss mono_mass="97.976896" avge_mass="97.9952" flag="false"
                              composition="H(3) O(4) P">
               <umod:element symbol="H" number="3"/>
               <umod:element symbol="O" number="4"/>
               <umod:element symbol="P" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="79.966331" avge_mass="79.9799" composition="H O(3) P">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>IonSource</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.ionsource.com/Card/phos/phos.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0037</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0033</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0038</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0039</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0222</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PHOS</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0034</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0036</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0035</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Protein which is posttranslationally modified by the attachment of at least one phosphate group usually on serine, threonine or tyrosine residues, but also on aspartic acid or histidine residues.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Dehydrated" full_name="Dehydration" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:05:47"
                approved="0"
                record_id="23">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="5">
            <umod:misc_notes>beta-elimination</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="4">
            <umod:misc_notes>beta-elimination</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="3">
            <umod:misc_notes>beta-elimination</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="Q" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="C" position="Any N-term" classification="Artefact"
                           spec_group="7">
            <umod:misc_notes>Pyro-carboxymethyl as a delta from Carboxymethyl-Cys</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="-18.010565" avge_mass="-18.0153" composition="H(-2) O(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:alt_name>didehydroalanine</umod:alt_name>
         <umod:alt_name>C-terminal imide</umod:alt_name>
         <umod:alt_name>Prompt loss of phosphate from phosphorylated residue</umod:alt_name>
         <umod:alt_name>D-Succinimide</umod:alt_name>
         <umod:xref>
            <umod:text>DHAS</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0303</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0302</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0181</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0182</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DHB</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Propionamide" full_name="Acrylamide adduct" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 10:35:51"
                approved="1"
                record_id="24">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="71.037114" avge_mass="71.0779" composition="H(5) C(3) N O">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pyridylacetyl" full_name="pyridylacetyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 12:47:43"
                approved="1"
                record_id="25">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="119.037114" avge_mass="119.1207" composition="H(5) C(7) N O">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>9276974</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Pyro-carbamidomethyl"
                full_name="S-carbamoylmethylcysteine cyclization (N-terminus)"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:05:25"
                approved="0"
                record_id="26">
         <umod:specificity hidden="0" site="C" position="Any N-term" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="39.994915" avge_mass="40.0208" composition="C(2) O">
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Carboxymethyl-Cys cyclization (N-terminus)</umod:alt_name>
         <umod:alt_name>Carbamidomethyl-Cys cyclization (N-terminus)</umod:alt_name>
         <umod:xref>
            <umod:text>12643538</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>J. Proteome Res. 1, 181-187 (2002)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Cyclisation of N-term Carbamidomethyl-Cys or Carboxymethyl-Cys. The delta is relative to Cys. For a delta relative to alkylated Cys, see Ammonia-loss and Dehydrated.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Glu-&gt;pyro-Glu" full_name="Pyro-glu from E" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2008-06-05 13:54:56"
                approved="1"
                record_id="27">
         <umod:specificity hidden="0" site="E" position="Any N-term" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="-18.010565" avge_mass="-18.0153" composition="H(-2) O(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0031</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Miller et.al. Arch. Biochem. Biophy. (1993) 301, 41-52.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>8442665</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PYRE</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Gln-&gt;pyro-Glu" full_name="Pyro-glu from Q" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-13 17:06:57"
                approved="1"
                record_id="28">
         <umod:specificity hidden="0" site="Q" position="Any N-term" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="-17.026549" avge_mass="-17.0305" composition="H(-3) N(-1)">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="N" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0031</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PYRR</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="SMA" full_name="N-Succinimidyl-3-morpholine acetate"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:41:18"
                approved="1"
                record_id="29">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="127.063329" avge_mass="127.1412" composition="H(9) C(6) N O(2)">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>10446193</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Sherman, N. E., Yates, N. A., Shabanowitz, J., Hunt, D. F., Jeffery, W. A., Bartlet-Jones, M., and Pappin, D. J. C. (1995) Proceedings of the 43rd ASMS Conference on Mass Spectrometry and Allied Topics, May 21-26, 1995, Atlanta, GA</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cation:Na" full_name="Sodium adduct" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-14 19:43:17"
                approved="1"
                record_id="30">
         <umod:specificity hidden="0" site="D" position="Anywhere" classification="Artefact"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="C-term" position="Any C-term" classification="Artefact"
                           spec_group="1"/>
         <umod:specificity hidden="0" site="E" position="Anywhere" classification="Artefact"
                           spec_group="2"/>
         <umod:delta mono_mass="21.981943" avge_mass="21.9818" composition="H(-1) Na">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="Na" number="1"/>
         </umod:delta>
         <umod:misc_notes>Proton replaced by sodium cation</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Pyridylethyl" full_name="S-pyridylethylation"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 12:43:38"
                approved="1"
                record_id="31">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="105.057849" avge_mass="105.1372" composition="H(7) C(7) N">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>11760118</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methyl" full_name="Methylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-14 10:32:35"
                approved="1"
                record_id="34">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="14"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="13"/>
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="10"/>
         <umod:specificity hidden="0" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="12"/>
         <umod:specificity hidden="0" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="12"/>
         <umod:specificity hidden="0" site="C-term" position="Any C-term" classification="Multiple"
                           spec_group="11"/>
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="Post-translational"
                           spec_group="9"/>
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="Post-translational"
                           spec_group="8"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="7"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Post-translational"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="14.015650" avge_mass="14.0266" composition="H(2) C">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
         </umod:delta>
         <umod:alt_name>methyl ester</umod:alt_name>
         <umod:xref>
            <umod:text>METH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0318</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0338</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0064</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0061</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0063</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0065</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0069</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0336</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0305</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0272</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0076</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0071</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0070</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0073</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0234</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0273</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0317</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0337</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0299</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0072</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11875433</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0105</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Oxidation" full_name="Oxidation or Hydroxylation"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2008-02-15 05:37:07"
                approved="0"
                record_id="35">
         <umod:specificity hidden="0" site="W" position="Anywhere" classification="Artefact"
                           spec_group="10"/>
         <umod:specificity hidden="0" site="H" position="Anywhere" classification="Artefact"
                           spec_group="10"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="9">
            <umod:misc_notes>Cysteine sulfenic acid</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="M" position="Anywhere" classification="Artefact"
                           spec_group="8">
            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
            <umod:NeutralLoss mono_mass="63.998285" avge_mass="64.1069" flag="false" composition="H(4) C O S">
               <umod:element symbol="H" number="4"/>
               <umod:element symbol="C" number="1"/>
               <umod:element symbol="O" number="1"/>
               <umod:element symbol="S" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="7"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Artefact"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Post-translational"
                           spec_group="4">
            <umod:misc_notes>Proline oxidation to glutamic semialdehyde</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="G" position="Any C-term" classification="Pre-translational"
                           spec_group="11">
            <umod:misc_notes>Hydroxyglycine derivative in amidation pathway</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="15.994915" avge_mass="15.9994" composition="O">
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>HYDR</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0322</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11212008</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11120890</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DOPA</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>CSEA</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>14661084</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0026</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15569593</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0205</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0215</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Lagerwerf FM, van de Weert M, Heerma W, Haverkamp J, Rapid Commun Mass Spectrom. 1996;10(15):1905-10</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0029</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0030</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9004526</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0028</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11461766</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0027</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0235</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0146</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>14661085</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12781462</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>2057999</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Dimethyl" full_name="di-Methylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-18 14:35:31"
                approved="1"
                record_id="36">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="P" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="5"/>
         <umod:delta mono_mass="28.031300" avge_mass="28.0532" composition="H(4) C(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>DIMETH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0311</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0068</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>14570711</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0067</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12964758</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0075</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0066</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Trimethyl" full_name="tri-Methylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-18 14:31:46"
                approved="1"
                record_id="37">
         <umod:specificity hidden="1" site="A" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="42.046950" avge_mass="42.0797" composition="H(6) C(3)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12590383</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0074</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0062</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Role of arginine and its methylated derivatives in cancer biology and treatment</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.cancerci.com/content/1/1/3</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>J. Hirota et. al., Rapid Commun. Mass Spectrom., 17 371-6 (2003)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>TRIMETH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>RESID gives the delta as 43 Da?</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Methylthio" full_name="Beta-methylthiolation"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:17:13"
                approved="0"
                record_id="39">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Multiple"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="45.987721" avge_mass="46.0916" composition="H(2) C S">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>Methyl methanethiosulfonate</umod:alt_name>
         <umod:alt_name>MMTS</umod:alt_name>
         <umod:xref>
            <umod:text>J. A. Kowalak and K. A. Walsh, Protein Science (1996) 5: 1625-1632</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0232</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>TRC data sheet</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.trc-canada.com/white_papers.lasso</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Applied Biosystems iTRAQ(TM) Reagents Chemistry Reference Guide Part Number 4351918 Rev. A</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://docs.appliedbiosystems.com/pebiodocs/04351918.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0320</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>8844851</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0101</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>BMTH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Sulfo" full_name="O-Sulfonation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 11:16:55"
                approved="1"
                record_id="40">
         <umod:specificity hidden="0" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="0" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="4">
            <umod:misc_notes>Sulfitolysis</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="79.956815" avge_mass="80.0632" composition="O(3) S">
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0362</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0361</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>SULF</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0171</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Medzihradszky et al., Mol. Cell. Proteomics 2004, 3, 429-440</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>14752058</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0172</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hex" full_name="Hexose" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 14:11:32"
                approved="1"
                record_id="41">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Other glycosylation"
                           spec_group="8"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other glycosylation"
                           spec_group="7"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other glycosylation"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Other glycosylation"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Other glycosylation"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Other glycosylation"
                           spec_group="3">
            <umod:misc_notes>glycation</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
                           spec_group="1">
            <umod:misc_notes>glycation</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="162.052824" avge_mass="162.1406" composition="Hex">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:alt_name>Fructose</umod:alt_name>
         <umod:alt_name>Glucose</umod:alt_name>
         <umod:alt_name>Galactose</umod:alt_name>
         <umod:alt_name>Mannose</umod:alt_name>
         <umod:xref>
            <umod:text>GLUC</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15279557</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0152</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0157</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0327</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0217</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>CMAN</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Lipoyl" full_name="Lipoyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:06:53"
                approved="1"
                record_id="42">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="188.032956" avge_mass="188.3103" composition="H(12) C(8) O S(2)">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>PDOC00168</umod:text>
            <umod:source>Prosite</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0118</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>LIPY</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>3522581</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>This group is normally a substituent on N6 of a lysine residue of an enzyme or other protein</umod:misc_notes>
      </umod:mod>
      <umod:mod title="HexNAc" full_name="N-Acetylhexosamine" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:10:27"
                approved="1"
                record_id="43">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Other glycosylation"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="203.079373" avge_mass="203.1925" composition="HexNAc">
            <umod:element symbol="H" number="13"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>GLCN</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0151</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0154</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>3086323</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0155</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>The amine derivative of a hexose formed by replacing a hydroxyl group with an amino group.(+acetyl group)</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Farnesyl" full_name="Farnesylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:11:38"
                approved="1"
                record_id="44">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="204.187801" avge_mass="204.3511" composition="H(24) C(15)">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="15"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15609361</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0102</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FARN</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Myristoyl" full_name="Myristoylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:13:17"
                approved="1"
                record_id="45">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="G" position="Any N-term" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="210.198366" avge_mass="210.3556" composition="H(26) C(14) O">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="14"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>PDOC00008</umod:text>
            <umod:source>Prosite</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0059</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0307</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0078</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>MYRI</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PyridoxalPhosphate" full_name="Pyridoxal phosphate"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:35:42"
                approved="1"
                record_id="46">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="229.014009" avge_mass="229.1266" composition="H(8) C(8) N O(5) P">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Biochemistry; D.Voet and J.G.Voet WILEY(p728)</umod:text>
            <umod:source>Book</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0119</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PLP</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>The co-enzyme derivative of vitamin B6. Forms Schiff\'s bases of substrate amino acids during catalysis of transamination, decarboxylation and racemisation reactions.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Palmitoyl" full_name="Palmitoylation" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:38:43"
                approved="1"
                record_id="47">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="5"/>
         <umod:delta mono_mass="238.229666" avge_mass="238.4088" composition="H(30) C(16) O">
            <umod:element symbol="H" number="30"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0080</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0079</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0106</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0077</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PALM</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0339</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0060</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Palmitoylation is a post-translational modification that consists in the addition of a 16 carbons fatty acid, palmitate, to a cysteine residue through the creation of a thioester link.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="GeranylGeranyl" full_name="Geranyl-geranyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 15:47:48"
                approved="1"
                record_id="48">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="272.250401" avge_mass="272.4681" composition="H(32) C(20)">
            <umod:element symbol="H" number="32"/>
            <umod:element symbol="C" number="20"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0104</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15609361</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>GERA</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Phosphopantetheine" full_name="Phosphopantetheine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 16:00:24"
                approved="1"
                record_id="49">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="340.085794" avge_mass="340.3330"
                     composition="H(21) C(11) N(2) O(6) P S">
            <umod:element symbol="H" number="21"/>
            <umod:element symbol="C" number="11"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="P" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0150</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PPAN</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Protein which contains at least one phosphopantetheine as the prosthetic group. In acyl carrier proteins (ACP) for example, it serves as a \'swinging arm\' for the attachment of activated fatty acid and amino-acid groups.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="FAD" full_name="Flavin adenine dinucleotide" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-16 17:16:18"
                approved="1"
                record_id="50">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="783.141486" avge_mass="783.5339"
                     composition="H(31) C(27) N(9) O(15) P(2)">
            <umod:element symbol="H" number="31"/>
            <umod:element symbol="C" number="27"/>
            <umod:element symbol="N" number="9"/>
            <umod:element symbol="O" number="15"/>
            <umod:element symbol="P" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0143</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Structure</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.aw-bc.com/mathews/EF/FAD.GIF</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0144</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0145</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0221</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FAD</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Tripalmitate" full_name="N-acyl diglyceride cysteine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-18 11:47:54"
                approved="1"
                record_id="51">
         <umod:specificity hidden="1" site="C" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="788.725777" avge_mass="789.3049" composition="H(96) C(51) O(5)">
            <umod:element symbol="H" number="96"/>
            <umod:element symbol="C" number="51"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>10356335</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Guanidinyl" full_name="Guanidination" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-10-15 19:58:44"
                approved="1"
                record_id="52">
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="42.021798" avge_mass="42.0400" composition="H(2) C N(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="2"/>
         </umod:delta>
         <umod:alt_name>homoarginine</umod:alt_name>
         <umod:xref>
            <umod:text>11078590</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>ASMS 2001 abstract</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.indiana.edu/~reillyjp/ASMS2001posters/beardsley_poster.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>11821862</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11085420</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Anal. Biochem. 287, p110-117, 2000</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Specific for sidechain of lysine. Does not modify the N-termini except for glycine at a slower rate than the side chain of lysine.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="HNE" full_name="4-hydroxynonenal (HNE)" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-08-19 19:17:11"
                date_time_modified="2006-11-14 11:38:12"
                approved="1"
                record_id="53">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="156.115030" avge_mass="156.2221" composition="H(16) C(9) O(2)">
            <umod:element symbol="H" number="16"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>11327326</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Poli G, Schaur RJ., IUBMB Life 2000 Oct-Nov;50(4-5):315-21</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>A lipid-type modification. HNE forms a Michael addition product on Cysteine, Histidine and Lysines. Unusually, it doesn\'t replace a hydrogen on the amino acid side chain.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Glucuronyl" full_name="N-glucuronylation" username_of_poster="jcottrell"
                group_of_poster="users"
                date_time_posted="2002-10-01 21:36:48"
                date_time_modified="2006-10-16 17:26:21"
                approved="1"
                record_id="54">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:delta mono_mass="176.032088" avge_mass="176.1241" composition="H(8) C(6) O(6)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
         <umod:alt_name>glucuronosyl</umod:alt_name>
         <umod:xref>
            <umod:text>AA0291</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0058</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Lin, T.S. Kolattukudy, P.E., Eur. J. Biochem. 106, 341-351, 1980</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>7398618</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>The addition of a sugar unit to a protein amino acid, e.g. the addition of glycan chains to proteins. Addition of glucuronic acid. Observed for N-term G</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Glutathione" full_name="glutathione disulfide"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2002-10-03 09:10:19"
                date_time_modified="2006-10-16 15:51:52"
                approved="1"
                record_id="55">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="305.068156" avge_mass="305.3076"
                     composition="H(15) C(10) N(3) O(6) S">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>3083866</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>8344916</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0229</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>GLUT</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Acetyl:2H(3)"
                full_name="Acetate labeling reagent (N-term &amp; K) (heavy form, +3amu)"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 16:41:56"
                date_time_modified="2006-10-16 10:02:50"
                approved="1"
                record_id="56">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="45.029395" avge_mass="45.0552" composition="H(-1) 2H(3) C(2) O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>N-trideuteriumacetoxy</umod:alt_name>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11999733</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12175151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Controlling Deuterium isotope effects in comparative proteomics.     Zhang, Roujian; Sioma, Cathy S.; Thompson, Robert A.; Xiong, Li; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Analytical Chemistry  (2</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Global internal standard technology for comparative proteomics.     Chakraborty, Asish; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Journal of Chromatography, A  (2002),  949(1-2),  173-184.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Propionyl"
                full_name="Propionate labeling reagent light form (N-term &amp; K)"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 16:52:38"
                date_time_modified="2006-10-16 10:17:00"
                approved="1"
                record_id="58">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="56.026215" avge_mass="56.0633" composition="H(4) C(3) O">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12175151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11999733</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Global internal standard technology for comparative proteomics.     Chakraborty, Asish; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Journal of Chromatography, A  (2002),  949(1-2),  173-184.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Controlling Deuterium isotope effects in comparative proteomics.     Zhang, Roujian; Sioma, Cathy S.; Thompson, Robert A.; Xiong, Li; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Analytical Chemistry  (2</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Propionyl:13C(3)"
                full_name="Propionate labeling reagent heavy form (+3amu), N-term &amp; K"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 16:55:47"
                date_time_modified="2006-10-16 10:27:21"
                approved="1"
                record_id="59">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="59.036279" avge_mass="59.0412" composition="H(4) 13C(3) O">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="13C" number="3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Global internal standard technology for comparative proteomics.     Chakraborty, Asish; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Journal of Chromatography, A  (2002),  949(1-2),  173-184.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Controlling Deuterium isotope effects in comparative proteomics.     Zhang, Roujian; Sioma, Cathy S.; Thompson, Robert A.; Xiong, Li; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Analytical Chemistry  (2</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12175151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11999733</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GIST-Quat"
                full_name="Quaternary amine labeling reagent light form (N-term &amp; K)"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 17:02:37"
                date_time_modified="2006-10-16 13:39:27"
                approved="1"
                record_id="60">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2">
            <umod:NeutralLoss mono_mass="59.073499" avge_mass="59.1103" flag="false"
                              composition="H(9) C(3) N">
               <umod:element symbol="H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="59.073499" avge_mass="59.1103" flag="false"
                              composition="H(9) C(3) N">
               <umod:element symbol="H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="127.099714" avge_mass="127.1842" composition="H(13) C(7) N O">
            <umod:element symbol="H" number="13"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>N-(4-trimethylammoniumbutanoxy)-NHS</umod:alt_name>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GIST-Quat:2H(3)"
                full_name="Quaternary amine labeling reagent heavy (+3amu) form, N-term &amp; K"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 17:09:34"
                date_time_modified="2006-10-16 13:40:03"
                approved="1"
                record_id="61">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2">
            <umod:NeutralLoss mono_mass="62.092330" avge_mass="62.1287" flag="false"
                              composition="H(6) 2H(3) C(3) N">
               <umod:element symbol="H" number="6"/>
               <umod:element symbol="2H" number="3"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="62.092330" avge_mass="62.1287" flag="false"
                              composition="H(6) 2H(3) C(3) N">
               <umod:element symbol="H" number="6"/>
               <umod:element symbol="2H" number="3"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="130.118544" avge_mass="130.2027" composition="H(10) 2H(3) C(7) N O">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GIST-Quat:2H(6)"
                full_name="Quaternary amine labeling reagent heavy form (+6amu), N-term &amp; K"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 17:12:27"
                date_time_modified="2006-10-16 13:40:56"
                approved="1"
                record_id="62">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2">
            <umod:NeutralLoss mono_mass="65.111160" avge_mass="65.1472" flag="false"
                              composition="H(3) 2H(6) C(3) N">
               <umod:element symbol="H" number="3"/>
               <umod:element symbol="2H" number="6"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="65.111160" avge_mass="65.1472" flag="false"
                              composition="H(3) 2H(6) C(3) N">
               <umod:element symbol="H" number="3"/>
               <umod:element symbol="2H" number="6"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="133.137375" avge_mass="133.2212" composition="H(7) 2H(6) C(7) N O">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="2H" number="6"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GIST-Quat:2H(9)"
                full_name="Quaternary amine labeling reagent heavy form (+9amu), N-term &amp; K"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 17:14:22"
                date_time_modified="2006-10-16 13:41:45"
                approved="1"
                record_id="63">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2">
            <umod:NeutralLoss mono_mass="68.129990" avge_mass="68.1657" flag="false"
                              composition="2H(9) C(3) N">
               <umod:element symbol="2H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="68.129990" avge_mass="68.1657" flag="false"
                              composition="2H(9) C(3) N">
               <umod:element symbol="2H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="136.156205" avge_mass="136.2397" composition="H(4) 2H(9) C(7) N O">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="2H" number="9"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Succinyl"
                full_name="Succinic anhydride labeling reagent light form (N-term &amp; K)"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 17:17:07"
                date_time_modified="2006-10-16 12:40:39"
                approved="1"
                record_id="64">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="100.016044" avge_mass="100.0728" composition="H(4) C(4) O(3)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Controlling Deuterium isotope effects in comparative proteomics.     Zhang, Roujian; Sioma, Cathy S.; Thompson, Robert A.; Xiong, Li; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Analytical Chemistry  (2</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12175151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0130</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Succinyl:2H(4)"
                full_name="Succinic anhydride labeling reagent, heavy form (+4amu, 4H2), N-term &amp; K"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 17:19:51"
                date_time_modified="2006-10-16 12:42:10"
                approved="1"
                record_id="65">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="104.041151" avge_mass="104.0974" composition="2H(4) C(4) O(3)">
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Controlling Deuterium isotope effects in comparative proteomics.     Zhang, Roujian; Sioma, Cathy S.; Thompson, Robert A.; Xiong, Li; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Analytical Chemistry  (2</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12175151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Succinyl:13C(4)"
                full_name="Succinic anhydride labeling reagent, heavy form (+4amu, 4C13), N-term &amp; K"
                username_of_poster="penner"
                group_of_poster="users"
                date_time_posted="2002-10-16 17:23:58"
                date_time_modified="2006-10-16 12:41:49"
                approved="1"
                record_id="66">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="104.029463" avge_mass="104.0434" composition="H(4) 13C(4) O(3)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="13C" number="4"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Controlling Deuterium isotope effects in comparative proteomics.     Zhang, Roujian; Sioma, Cathy S.; Thompson, Robert A.; Xiong, Li; Regnier, Fred E..    Department of Chemistry,  Purdue University,  West Lafayette,  IN,  USA.    Analytical Chemistry  (2</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Comparative proteomics based on stable isotope labeling and affinity selection.     Regnier, Fred E.; Riggs, Larry; Zhang, Roujian; Xiong, Li; Liu, Peiran; Chakraborty, Asish; Seeley, Erin; Sioma, Cathy; Thompson, Robert A.    Department of Chemistry,  Pu</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11857757</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12175151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="probiotinhydrazide"
                full_name="oxidized proline biotinylated with biotin hydrazide"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:56:20"
                date_time_modified="2006-11-14 12:12:19"
                approved="0"
                record_id="357">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="258.115047" avge_mass="258.3405"
                     composition="H(18) C(10) N(4) O(2) S">
            <umod:element symbol="H" number="18"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>http://www.piercenet.com/Proteomics/browse.cfm?fldID=84EBE112-F871-4CA5-807F-47327153CFCB</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15174056</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Yoo, Byoung-Sam; Regnier, Fred E. Electrophoresis (2004), 25(9), 1334-1341</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Pro-&gt;pyro-Glu" full_name="proline oxidation to pyroglutamic acid"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:58:42"
                date_time_modified="2006-10-14 10:03:34"
                approved="1"
                record_id="359">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="13.979265" avge_mass="13.9835" composition="H(-2) O">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>10717661</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="His-&gt;Asn" full_name="histidine oxidation to aspargine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:43:27"
                date_time_modified="2008-01-24 15:40:23"
                approved="1"
                record_id="348">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="AA substitution"
                           spec_group="1">
            <umod:misc_notes>Could also be classed as chemical derivative</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="-23.015984" avge_mass="-23.0366" composition="H(-1) C(-2) N(-1) O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="His-&gt;Asp" full_name="histidine oxidation to aspartic acid"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:44:32"
                date_time_modified="2008-01-24 15:40:44"
                approved="1"
                record_id="349">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="AA substitution"
                           spec_group="1">
            <umod:misc_notes>Could also be classed as chemical derivative</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="-22.031969" avge_mass="-22.0519"
                     composition="H(-2) C(-2) N(-2) O(2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Trp-&gt;Hydroxykynurenin"
                full_name="tryptophan oxidation to hydroxykynurenin"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:47:20"
                date_time_modified="2006-11-14 17:40:45"
                approved="1"
                record_id="350">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="19.989829" avge_mass="19.9881" composition="C(-1) O(2)">
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Degradation of the amino acids Isoleucine, Leucine and Tryptophan</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.lbqp.unb.br/bioq/htm/aulas2D/deg_aa_ile_leu_trp.htm?reload_coolmenus</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:H(4)C(3)" full_name="Propionaldehyde +40"
                username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-08-12 20:04:01"
                date_time_modified="2006-10-15 18:30:52"
                approved="1"
                record_id="256">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="40.031300" avge_mass="40.0639" composition="H(4) C(3)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Delta:H(4)C(2)" full_name="Acetaldehyde +28" username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-08-12 20:02:38"
                date_time_modified="2006-10-15 17:55:18"
                approved="1"
                record_id="255">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="28.031300" avge_mass="28.0532" composition="H(4) C(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
         </umod:delta>
         <umod:misc_notes>Reduction of Schiff base formed between K amino group and acetaldehyde</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Cys-&gt;Dha" full_name="Dehydroalanine (from Cysteine)"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-02 17:31:11"
                date_time_modified="2006-10-13 15:27:46"
                approved="1"
                record_id="368">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="-33.987721" avge_mass="-34.0809" composition="H(-2) S(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>11212008</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Arg-&gt;GluSA" full_name="Arginine oxidation to glutamic semialdehyde"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:38:24"
                date_time_modified="2006-11-16 15:25:28"
                approved="1"
                record_id="344">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="-43.053433" avge_mass="-43.0711" composition="H(-5) C(-1) N(-3) O">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Arginine oxidation to gamma-glutamyl semialdehyde</umod:alt_name>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Jesus Requena, Chien-Chung Chao, Rodney L. Levine, and Earl R. Stadtman, Glutamic and aminoadipic semialdehydes are the main carbonyl products of metal-catalyzed oxidation of proteins, PNAS 98 69-74 (2001)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.pnas.org/cgi/content/full/98/1/69</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>1680314</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Trioxidation" full_name="cysteine oxidation to cysteic acid"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:39:38"
                date_time_modified="2006-10-16 10:12:44"
                approved="1"
                record_id="345">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="47.984744" avge_mass="47.9982" composition="O(3)">
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>14678012</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Iminobiotin" full_name="Iminobiotinylation"
                username_of_poster="toppolzer"
                group_of_poster="users"
                date_time_posted="2002-11-25 16:01:48"
                date_time_modified="2006-10-16 15:26:37"
                approved="1"
                record_id="89">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="225.093583" avge_mass="225.3106" composition="H(15) C(10) N(3) O S">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>9750125</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ESP" full_name="ESP-Tag light d0" username_of_poster="toppolzer"
                group_of_poster="users"
                date_time_posted="2002-11-25 16:12:50"
                date_time_modified="2006-10-16 15:58:19"
                approved="1"
                record_id="90">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="338.177647" avge_mass="338.4682"
                     composition="H(26) C(16) N(4) O(2) S">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Poster abstract P-48</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.wzw.tum.de/proteomik/forum2003/Posters-Abstracts.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ESP:2H(10)" full_name="ESP-Tag heavy d10" username_of_poster="toppolzer"
                group_of_poster="users"
                date_time_posted="2002-11-25 16:18:58"
                date_time_modified="2006-10-16 16:03:06"
                approved="1"
                record_id="91">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="348.240414" avge_mass="348.5299"
                     composition="H(16) 2H(10) C(16) N(4) O(2) S">
            <umod:element symbol="H" number="16"/>
            <umod:element symbol="2H" number="10"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Poster abstract P-48</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.wzw.tum.de/proteomik/forum2003/Posters-Abstracts.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NHS-LC-Biotin" full_name="NHS-LC-Biotin" username_of_poster="toppolzer"
                group_of_poster="users"
                date_time_posted="2002-12-04 09:55:19"
                date_time_modified="2006-11-14 11:14:57"
                approved="0"
                record_id="92">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="339.161662" avge_mass="339.4530"
                     composition="H(25) C(16) N(3) O(3) S">
            <umod:element symbol="H" number="25"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Introduction to Protein Labeling</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Proteomics/browse.cfm?fldID=84EBE112-F871-4CA5-807F-47327153CFCB</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>EZ-Link Sulfo-NHS-Biotin Reagents</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=8D38BA83-EFDC-421A-853F-E96EBA380612</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="EDT-maleimide-PEO-biotin" full_name="EDT-maleimide-PEO-biotin"
                username_of_poster="take"
                group_of_poster="users"
                date_time_posted="2002-12-27 09:08:56"
                date_time_modified="2006-11-14 11:15:06"
                approved="0"
                record_id="93">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="601.206246" avge_mass="601.8021"
                     composition="H(39) C(25) N(5) O(6) S(3)">
            <umod:element symbol="H" number="39"/>
            <umod:element symbol="C" number="25"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>EZ-Link Maleimide PEOn-Biotin (n = 2 and 11)</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=01031005</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="IMID" full_name="IMID d0" username_of_poster="Liao"
                group_of_poster="users"
                date_time_posted="2003-01-09 04:14:06"
                date_time_modified="2006-10-16 10:33:45"
                approved="1"
                record_id="94">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="68.037448" avge_mass="68.0773" composition="H(4) C(3) N(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="2"/>
         </umod:delta>
         <umod:alt_name>2-methoxy-4,5-dihydro-1H-imidazole derivative</umod:alt_name>
         <umod:alt_name>Lys imidazole</umod:alt_name>
         <umod:xref>
            <umod:text>11746907</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Rapid Communications in Mass Spectrometry, Volume 15, Issue 24 , Pages 2387 - 2392</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1002/rcm.517</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Agilent Lys Tag 4H Reagent Kit</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chem.agilent.com/cag/lystag.asp</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Poster: Kelly Zhang, Gordon Nicol, Nina Zolotarjova, Cory Szafranski, Jerome Bailey, Liang-Sheng Yang, and Barry Boyes</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chem.agilent.com/cag/other/IMTHUPO2003.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="IMID:2H(4)" full_name="IMID d4" username_of_poster="Liao"
                group_of_poster="users"
                date_time_posted="2003-01-09 04:15:25"
                date_time_modified="2006-10-16 11:06:13"
                approved="1"
                record_id="95">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="72.062555" avge_mass="72.1019" composition="2H(4) C(3) N(2)">
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="2"/>
         </umod:delta>
         <umod:alt_name>2-methoxy-4,5-dihydro-1H-imidazole derivative</umod:alt_name>
         <umod:xref>
            <umod:text>Rapid Communications in Mass Spectrometry, Volume 15, Issue 24 , Pages 2387 - 2392</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1002/rcm.517</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Agilent Lys Tag 4H Reagent Kit</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chem.agilent.com/cag/lystag.asp</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>11746907</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Poster: Kelly Zhang, Gordon Nicol, Nina Zolotarjova, Cory Szafranski, Jerome Bailey, Liang-Sheng Yang, and Barry Boyes</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chem.agilent.com/cag/other/IMTHUPO2003.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Lysbiotinhydrazide"
                full_name="oxidized Lysine biotinylated with biotin hydrazide"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:51:13"
                date_time_modified="2006-11-14 12:12:01"
                approved="0"
                record_id="353">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="241.088497" avge_mass="241.3100"
                     composition="H(15) C(10) N(3) O(2) S">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>http://www.piercenet.com/Proteomics/browse.cfm?fldID=84EBE112-F871-4CA5-807F-47327153CFCB</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Yoo, Byoung-Sam; Regnier, Fred E. Electrophoresis (2004), 25(9), 1334-1341</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Propionamide:2H(3)" full_name="Acrylamide d3" username_of_poster="Liao"
                group_of_poster="users"
                date_time_posted="2003-01-14 08:10:30"
                date_time_modified="2006-10-16 11:07:07"
                approved="1"
                record_id="97">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="74.055944" avge_mass="74.0964" composition="H(2) 2H(3) C(3) N O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Nitro" full_name="Oxidation to nitro" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:52:38"
                date_time_modified="2006-10-16 10:02:15"
                approved="1"
                record_id="354">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="44.985078" avge_mass="44.9976" composition="H(-1) N O(2)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>8839040</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICAT-C" full_name="Applied Biosystems cleavable ICAT(TM) light"
                username_of_poster="tpjd2"
                group_of_poster="users"
                date_time_posted="2003-01-27 10:27:11"
                date_time_modified="2006-10-16 15:32:17"
                approved="1"
                record_id="105">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="227.126991" avge_mass="227.2603" composition="H(17) C(10) N(3) O(3)">
            <umod:element symbol="H" number="17"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>ICAT page from the Royal Society of Chemistry</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chemsoc.org/exemplarchem/entries/2002/proteomics/icat.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Applied Biosystems product page</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>https://products.appliedbiosystems.com/ab/en/US/adirect/ab?cmd=catNavigate2&amp;catID=600902</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Cleavable ICAT Reagent Kit for Protein Labeling</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://docs.appliedbiosystems.com/pebiodocs/04333373.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:H(2)C(2)" full_name="Acetaldehyde +26" username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-08-12 20:01:03"
                date_time_modified="2006-10-14 19:44:29"
                approved="1"
                record_id="254">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="26.015650" avge_mass="26.0373" composition="H(2) C(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>7744761</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Lys modification is formation of Schiff base.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Trp-&gt;Kynurenin" full_name="tryptophan oxidation to kynurenin"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:48:33"
                date_time_modified="2006-10-14 09:39:53"
                approved="1"
                record_id="351">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="3.994915" avge_mass="3.9887" composition="C(-1) O">
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Lys-&gt;Allysine" full_name="Lysine oxidation to aminoadipic semialdehyde"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:49:59"
                date_time_modified="2006-10-13 18:27:28"
                approved="1"
                record_id="352">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-1.031634" avge_mass="-1.0311" composition="H(-3) N(-1) O">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0121</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>ALLYS</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11120890</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICAT-C:13C(9)" full_name="Applied Biosystems cleavable ICAT(TM) heavy"
                username_of_poster="tpjd2"
                group_of_poster="users"
                date_time_posted="2003-01-27 10:32:53"
                date_time_modified="2006-10-16 15:34:14"
                approved="1"
                record_id="106">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="236.157185" avge_mass="236.1942"
                     composition="H(17) C 13C(9) N(3) O(3)">
            <umod:element symbol="H" number="17"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="13C" number="9"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Cleavable ICAT Reagent Kit for Protein Labeling</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://docs.appliedbiosystems.com/pebiodocs/04333373.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Applied Biosystems product page</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>https://products.appliedbiosystems.com/ab/en/US/adirect/ab?cmd=catNavigate2&amp;catID=600902</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>ICAT page from the Royal Society of Chemistry</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chemsoc.org/exemplarchem/entries/2002/proteomics/icat.htm</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="FormylMet" full_name="Addition of N-formyl met"
                username_of_poster="jphilip"
                group_of_poster="users"
                date_time_posted="2003-01-27 18:24:14"
                date_time_modified="2006-10-16 14:08:15"
                approved="1"
                record_id="107">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Pre-translational"
                           spec_group="1">
            <umod:misc_notes>only with Listeria monocytogenes (gram-positive bacteria)</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="159.035399" avge_mass="159.2062" composition="H(9) C(6) N O(2) S">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0021</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>10825024</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>8758896</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Nethylmaleimide" full_name="N-ethylmaleimide on cysteines"
                username_of_poster="Pflieger"
                group_of_poster="users"
                date_time_posted="2003-01-30 09:52:51"
                date_time_modified="2006-10-16 13:36:10"
                approved="1"
                record_id="108">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="125.047679" avge_mass="125.1253" composition="H(7) C(6) N O(2)">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>CysNEM</umod:alt_name>
         <umod:xref>
            <umod:text>reaction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chemistry.ucsc.edu/~fink/231/Image118.gif</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12777388</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11813307</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="OxLysBiotinRed"
                full_name="Oxidized lysine biotinylated with biotin-LC-hydrazide, reduced"
                username_of_poster="S_Lee"
                group_of_poster="users"
                date_time_posted="2003-02-21 00:53:43"
                date_time_modified="2006-11-14 12:10:49"
                approved="0"
                record_id="112">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="354.172562" avge_mass="354.4676"
                     composition="H(26) C(16) N(4) O(3) S">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="IBTP" full_name="Thio Ether Formation - BTP Adduct"
                username_of_poster="MRCDunn"
                group_of_poster="users"
                date_time_posted="2003-03-13 09:36:40"
                date_time_modified="2006-10-16 15:52:42"
                approved="1"
                record_id="119">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="316.138088" avge_mass="316.3759" composition="H(21) C(22) P">
            <umod:element symbol="H" number="21"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>J. Biol. Chem 2002 vol277 pp17048-17056</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11861642</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="OxLysBiotin"
                full_name="Oxidized lysine biotinylated with biotin-LC-hydrazide"
                username_of_poster="S_Lee"
                group_of_poster="users"
                date_time_posted="2003-02-21 01:25:11"
                date_time_modified="2006-11-14 12:10:53"
                approved="0"
                record_id="113">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="352.156911" avge_mass="352.4518"
                     composition="H(24) C(16) N(4) O(3) S">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="OxProBiotinRed"
                full_name="Oxidized proline biotinylated with biotin-LC-hydrazide, reduced"
                username_of_poster="S_Lee"
                group_of_poster="users"
                date_time_posted="2003-02-21 01:34:28"
                date_time_modified="2006-11-14 12:11:11"
                approved="0"
                record_id="114">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="371.199111" avge_mass="371.4982"
                     composition="H(29) C(16) N(5) O(3) S">
            <umod:element symbol="H" number="29"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="OxProBiotin"
                full_name="Oxidized Proline biotinylated with biotin-LC-hydrazide"
                username_of_poster="S_Lee"
                group_of_poster="users"
                date_time_posted="2003-02-21 01:35:44"
                date_time_modified="2006-11-14 12:11:17"
                approved="0"
                record_id="115">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="369.183461" avge_mass="369.4823"
                     composition="H(27) C(16) N(5) O(3) S">
            <umod:element symbol="H" number="27"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="OxArgBiotin"
                full_name="Oxidized arginine biotinylated with biotin-LC-hydrazide"
                username_of_poster="S_Lee"
                group_of_poster="users"
                date_time_posted="2003-02-21 01:41:19"
                date_time_modified="2006-11-14 12:11:31"
                approved="0"
                record_id="116">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="310.135113" avge_mass="310.4118"
                     composition="H(22) C(15) N(2) O(3) S">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Reference  http://www.piercenet.com/Proteomics/browse.cfm?fldID=84EBE112-F871-4CA5-807F-47327153CFCB</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>http://web.indstate.edu/thcme/mwking/nitrogen-metabolism.html#urea</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="OxArgBiotinRed"
                full_name="Oxidized arginine biotinylated with biotin-LC-hydrazide, reduced"
                username_of_poster="S_Lee"
                group_of_poster="users"
                date_time_posted="2003-02-21 01:43:00"
                date_time_modified="2006-11-14 12:11:35"
                approved="0"
                record_id="117">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="312.150763" avge_mass="312.4277"
                     composition="H(24) C(15) N(2) O(3) S">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>http://web.indstate.edu/thcme/mwking/nitrogen-metabolism.html#urea</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>http://www.piercenet.com/Proteomics/browse.cfm?fldID=84EBE112-F871-4CA5-807F-47327153CFCB</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="EDT-iodoacetyl-PEO-biotin" full_name="EDT-iodo-PEO-biotin"
                username_of_poster="take"
                group_of_poster="users"
                date_time_posted="2003-02-24 07:18:42"
                date_time_modified="2006-10-16 17:01:15"
                approved="1"
                record_id="118">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="490.174218" avge_mass="490.7034"
                     composition="H(34) C(20) N(4) O(4) S(3)">
            <umod:element symbol="H" number="34"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="3"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="GlyGly" full_name="ubiquitinylation residue"
                username_of_poster="gielbert"
                group_of_poster="users"
                date_time_posted="2003-04-30 13:32:37"
                date_time_modified="2008-04-21 18:24:57"
                approved="1"
                record_id="121">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Other" spec_group="3"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="4"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="114.042927" avge_mass="114.1026" composition="H(6) C(4) N(2) O(2)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>glycineglycine</umod:alt_name>
         <umod:xref>
            <umod:text>Grou et al., J Biol Chem. 2008 Mar 22; Epub</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.jbc.org/cgi/content/abstract/M800402200v1</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Wang et al., J Cell Biol. 2007 May 21;177(4):613-24</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/17502423</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12872131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>The Ubiquitin System for Protein Modification and Degradation</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.nottingham.ac.uk/biochemcourses/students/ub/ubindex.html</umod:url>
         </umod:xref>
         <umod:misc_notes>The two glycine residues left on ubiquitinylated lysine after tryptic digestion</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Formyl" full_name="Formylation" username_of_poster="pnacman"
                group_of_poster="users"
                date_time_posted="2003-05-01 13:28:36"
                date_time_modified="2006-11-14 12:01:57"
                approved="1"
                record_id="122">
         <umod:specificity hidden="0" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="5">
            <umod:misc_notes>A protein in which either the N-terminal N-formylmethionine has not been processed by the methionyl-tRNA formyltransferase or which is posttranslationally modified by the attachment of at least one formyl group.</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Artefact"
                           spec_group="4">
            <umod:misc_notes>Can occur under CNBr cleavage conditions (70% HCOOH)</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
                           spec_group="1">
            <umod:misc_notes>Can occur under CNBr cleavage conditions (70% HCOOH)</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Artefact"
                           spec_group="2">
            <umod:misc_notes>Can occur under CNBr cleavage conditions (70% HCOOH)</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Artefact"
                           spec_group="3">
            <umod:misc_notes>Can occur under CNBr cleavage conditions (70% HCOOH)</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="27.994915" avge_mass="28.0101" composition="C O">
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0211</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15799070</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0021</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FORM</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0384</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0057</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0384</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICAT-H" full_name="N-iodoacetyl, p-chlorobenzyl-12C6-glucamine"
                username_of_poster="allis"
                group_of_poster="users"
                date_time_posted="2003-05-07 19:54:20"
                date_time_modified="2006-10-16 16:02:00"
                approved="1"
                record_id="123">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="345.097915" avge_mass="345.7754" composition="H(20) C(15) N O(6) Cl">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="Cl" number="1"/>
         </umod:delta>
         <umod:alt_name>Harbury glyco-ICAT C12</umod:alt_name>
         <umod:xref>
            <umod:text>Silverman, Harbury,  J. Biol. Chem.  2002, 277, 34, pp. 30968-30975</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12185208</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICAT-H:13C(6)" full_name="N-iodoacetyl, p-chlorobenzyl-13C6-glucamine"
                username_of_poster="allis"
                group_of_poster="users"
                date_time_posted="2003-05-07 19:56:12"
                date_time_modified="2006-10-16 16:04:02"
                approved="1"
                record_id="124">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="351.118044" avge_mass="351.7313"
                     composition="H(20) C(9) 13C(6) N O(6) Cl">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="Cl" number="1"/>
         </umod:delta>
         <umod:alt_name>Harbury glyco-ICAT C13</umod:alt_name>
         <umod:xref>
            <umod:text>Silverman, Harbury,  J. Biol. Chem.  2002, 277, 34, pp. 30968-30975</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12185208</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cation:K" full_name="Replacement of proton by potassium"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-15 18:29:43"
                date_time_modified="2006-10-18 11:17:39"
                approved="1"
                record_id="530">
         <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Artefact"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="37.955882" avge_mass="38.0904" composition="H(-1) K">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="K" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thioacyl" full_name="thioacylation of primary amines (N-term and Lys)"
                username_of_poster="rabah"
                group_of_poster="users"
                date_time_posted="2003-06-05 13:38:19"
                date_time_modified="2006-10-16 12:37:13"
                approved="1"
                record_id="126">
         <umod:specificity hidden="1" site="N-term" position="Anywhere" classification="Other"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="87.998285" avge_mass="88.1283" composition="H(4) C(3) O S">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>3,3-Dithio-bis-(sulfosuccinimidyl)propionate</umod:alt_name>
         <umod:xref>
            <umod:text>Lomant, A.J. and Fairbanks, G., J.Mol. Biol. 104, 243-261 (1976)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Lee,W.T. and Conrad, D.H. 1985, J. Immunol. 134:518</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11710128</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>3155470</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>957432</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Fluoro" full_name="fluorophenylalanine replacement of phenylalanine"
                username_of_poster="jschulte"
                group_of_poster="users"
                date_time_posted="2003-06-19 19:54:25"
                date_time_modified="2007-07-08 18:42:53"
                approved="1"
                record_id="127">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Non-standard residue"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Non-standard residue"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Non-standard residue"
                           spec_group="3"/>
         <umod:delta mono_mass="17.990578" avge_mass="17.9905" composition="H(-1) F">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="F" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>1093385</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Fluorescein"
                full_name="5-Iodoacetamidofluorescein (Molecular Probe, Eugene, OR)"
                username_of_poster="Philip"
                group_of_poster="users"
                date_time_posted="2003-06-25 02:58:18"
                date_time_modified="2006-10-16 16:42:41"
                approved="1"
                record_id="128">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="388.082112" avge_mass="388.3497" composition="H(14) C(22) N O(6)">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
         <umod:xref>
            <umod:text>5-iodoacetamidofluorescein, [63368-54-7]</umod:text>
            <umod:source>CAS Registry</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>3578767</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Gorman, J. J., Eur. J. Biochem 1987, 168-9</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Gorman, J. J., Anal Biochem 1984, 160, 376</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>3311742</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Iodo" full_name="Iodination" username_of_poster="brettsp"
                group_of_poster="users"
                date_time_posted="2003-07-10 15:43:17"
                date_time_modified="2006-10-16 13:38:03"
                approved="1"
                record_id="129">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="125.896648" avge_mass="125.8965" composition="H(-1) I">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="I" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>2026710</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15627961</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Diiodo" full_name="di-Iodination" username_of_poster="brettsp"
                group_of_poster="users"
                date_time_posted="2003-07-10 15:49:42"
                date_time_modified="2006-10-16 15:45:24"
                approved="1"
                record_id="130">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="251.793296" avge_mass="251.7931" composition="H(-2) I(2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="I" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15627961</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Triiodo" full_name="tri-Iodination" username_of_poster="brettsp"
                group_of_poster="users"
                date_time_posted="2003-07-10 15:51:32"
                date_time_modified="2006-10-16 16:36:49"
                approved="1"
                record_id="131">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="377.689944" avge_mass="377.6896" composition="H(-3) I(3)">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="I" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>2026710</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15627961</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Myristoleyl" full_name="(cis-delta 5)-tetradecaenoyl"
                username_of_poster="tomneubert"
                group_of_poster="users"
                date_time_posted="2003-07-18 21:30:51"
                date_time_modified="2006-10-16 15:11:18"
                approved="1"
                record_id="134">
         <umod:specificity hidden="1" site="G" position="Protein N-term" classification="Co-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="208.182715" avge_mass="208.3398" composition="H(24) C(14) O">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="14"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>myristoyl with one double bond</umod:alt_name>
         <umod:alt_name>C14:1 acylation</umod:alt_name>
         <umod:xref>
            <umod:text>Neubert TA, Johnson RS, Hurley JB, Walsh KA (1992). The rod transducin alpha subunit amino terminus is heterogeneously fatty acylated. J Biol Chem. 267(26):18274-7.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>1326520</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Found on vision signal transduction proteins</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Pro-&gt;Pyrrolidinone" full_name="Proline oxidation to pyrrolidinone"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 23:00:19"
                date_time_modified="2006-10-13 15:37:42"
                approved="1"
                record_id="360">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="-30.010565" avge_mass="-30.0260" composition="H(-2) C(-1) O(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Myristoyl+Delta:H(-4)"
                full_name="(cis,cis-delta 5, delta 8)-tetradecadienoyl"
                username_of_poster="tomneubert"
                group_of_poster="users"
                date_time_posted="2003-07-18 21:36:44"
                date_time_modified="2006-10-16 15:10:51"
                approved="1"
                record_id="135">
         <umod:specificity hidden="1" site="G" position="Protein N-term" classification="Co-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="206.167065" avge_mass="206.3239" composition="H(22) C(14) O">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="14"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>myristoyl with 2 double bonds</umod:alt_name>
         <umod:alt_name>C14:2 fatty acylation</umod:alt_name>
         <umod:xref>
            <umod:text>Neubert TA, Johnson RS, Hurley JB, Walsh KA (1992). The rod transducin alpha subunit amino terminus is heterogeneously fatty acylated. J Biol Chem. 267(26):18274-7.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>1326520</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Found on vision signal transduction proteins</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Benzoyl" full_name="labeling reagent light form (N-term &amp; K)"
                username_of_poster="samirjulka"
                group_of_poster="users"
                date_time_posted="2003-07-31 22:24:05"
                date_time_modified="2006-10-16 12:41:22"
                approved="1"
                record_id="136">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="104.026215" avge_mass="104.1061" composition="H(4) C(7) O">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Julka,S.Regnier,F.E Anal Chem. 2004 Oct 1;76(19):5799-806.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15456300</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hex(5)HexNAc(2)" full_name="N-linked glycan core"
                username_of_poster="tpjd2"
                group_of_poster="users"
                date_time_posted="2003-08-06 11:31:37"
                date_time_modified="2006-10-16 17:22:04"
                approved="1"
                record_id="137">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="1216.422863" avge_mass="1217.0880" composition="Hex(5) HexNAc(2)">
            <umod:element symbol="H" number="76"/>
            <umod:element symbol="C" number="46"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="35"/>
         </umod:delta>
         <umod:alt_name>Man5</umod:alt_name>
         <umod:misc_notes>Core structure of high-mannose N-linked oligosaccharides</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Dansyl" full_name="5-dimethylaminonaphthalene-1-sulfonyl"
                username_of_poster="allis"
                group_of_poster="users"
                date_time_posted="2003-08-19 02:51:24"
                date_time_modified="2006-10-16 15:36:09"
                approved="1"
                record_id="139">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="233.051049" avge_mass="233.2862" composition="H(11) C(12) N O(2) S">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="12"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>dansyl chloride [605-65-2]</umod:text>
            <umod:source>CAS Registry</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="a-type-ion" full_name="ISD a-series (C-Term)"
                username_of_poster="suckau"
                group_of_poster="users"
                date_time_posted="2003-09-02 16:17:09"
                date_time_modified="2006-10-14 07:46:22"
                approved="1"
                record_id="140">
         <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Other"
                           spec_group="1">
            <umod:misc_notes>Virtual Modification  for MS/MS of a-type ions</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="-29.002740" avge_mass="-29.0180" composition="H(-1) C(-1) O(-1)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:alt_name>Decarboxylation of C-terminus as reaction inside the mass spectrometer</umod:alt_name>
         <umod:xref>
            <umod:text>14588022</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>D. Suckau, A. Resemann, Anal. Chem., 75(21):5817-24 (2003)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>MS/MS experiments of mass spectrometric a-ions (MS^3) can be used for protein identification by library searching. T3-sequencing is such a technique (see reference). Search engines must recognize this \'virtual modification\' for this purpose.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Amidine"
                full_name="amidination of lysines or N-terminal amines with methyl acetimidate"
                username_of_poster="pnacman"
                group_of_poster="users"
                date_time_posted="2003-09-25 11:04:41"
                date_time_modified="2006-10-15 18:32:25"
                approved="1"
                record_id="141">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="41.026549" avge_mass="41.0519" composition="H(3) C(2) N">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>ASMS 2004 abstract</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.indiana.edu/~reillyjp/ASMS2004/janecki_Ext-Abs%20Amidination.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12643539</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>6273432</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="HexNAc(1)dHex(1)" full_name="HexNAc1dHex1" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:28:45"
                date_time_modified="2006-10-16 16:03:39"
                approved="1"
                record_id="142">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="349.137281" avge_mass="349.3337" composition="dHex HexNAc">
            <umod:element symbol="H" number="23"/>
            <umod:element symbol="C" number="14"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="9"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="HexNAc(2)" full_name="HexNAc2" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:37:55"
                date_time_modified="2006-10-16 16:43:09"
                approved="1"
                record_id="143">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="406.158745" avge_mass="406.3850" composition="HexNAc(2)">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="10"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(3)" full_name="Hex3" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:39:30"
                date_time_modified="2006-10-16 16:59:36"
                approved="1"
                record_id="144">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="486.158471" avge_mass="486.4218" composition="Hex(3)">
            <umod:element symbol="H" number="30"/>
            <umod:element symbol="C" number="18"/>
            <umod:element symbol="O" number="15"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="HexNAc(1)dHex(2)" full_name="HexNAc1dHex2" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:40:57"
                date_time_modified="2006-10-16 17:01:52"
                approved="1"
                record_id="145">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="495.195190" avge_mass="495.4749" composition="dHex(2) HexNAc">
            <umod:element symbol="H" number="33"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="13"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(1)dHex(1)" full_name="Hex1HexNAc1dHex1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:42:27"
                date_time_modified="2006-10-16 17:02:06"
                approved="1"
                record_id="146">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="511.190105" avge_mass="511.4743" composition="dHex Hex HexNAc">
            <umod:element symbol="H" number="33"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="14"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="HexNAc(2)dHex(1)" full_name="HexNAc2dHex1" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:44:18"
                date_time_modified="2006-10-16 17:04:11"
                approved="1"
                record_id="147">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="552.216654" avge_mass="552.5262" composition="dHex HexNAc(2)">
            <umod:element symbol="H" number="36"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="14"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(2)" full_name="Hex1HexNAc2" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:48:18"
                date_time_modified="2006-10-16 17:04:35"
                approved="1"
                record_id="148">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="568.211569" avge_mass="568.5256" composition="Hex HexNAc(2)">
            <umod:element symbol="H" number="36"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="15"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(1)NeuAc(1)" full_name="Hex1HexNAc1NeuAc1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:51:19"
                date_time_modified="2007-10-20 19:29:29"
                approved="1"
                record_id="149">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="2"/>
         <umod:delta mono_mass="656.227613" avge_mass="656.5877" composition="Hex HexNAc NeuAc">
            <umod:element symbol="H" number="40"/>
            <umod:element symbol="C" number="25"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="18"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Saito T., Itoh T.; Journal of dairy Science, 75 (1992). p1768.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="HexNAc(2)dHex(2)" full_name="HexNAc2dHex2" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:52:36"
                date_time_modified="2006-10-16 17:11:45"
                approved="1"
                record_id="150">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="698.274563" avge_mass="698.6674" composition="dHex(2) HexNAc(2)">
            <umod:element symbol="H" number="46"/>
            <umod:element symbol="C" number="28"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="18"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(2)Pent(1)" full_name="Hex1HexNAc2Pent1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:53:29"
                date_time_modified="2006-10-16 17:12:02"
                approved="1"
                record_id="151">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="700.253828" avge_mass="700.6403" composition="Pent Hex HexNAc(2)">
            <umod:element symbol="H" number="44"/>
            <umod:element symbol="C" number="27"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="19"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(2)dHex(1)" full_name="Hex1HexNAc2dHex1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:54:18"
                date_time_modified="2006-10-16 17:12:59"
                approved="1"
                record_id="152">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="714.269478" avge_mass="714.6668" composition="dHex Hex HexNAc(2)">
            <umod:element symbol="H" number="46"/>
            <umod:element symbol="C" number="28"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="19"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(2)HexNAc(2)" full_name="Hex2HexNAc2" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:55:08"
                date_time_modified="2006-10-16 17:13:17"
                approved="1"
                record_id="153">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="730.264392" avge_mass="730.6662" composition="Hex(2) HexNAc(2)">
            <umod:element symbol="H" number="46"/>
            <umod:element symbol="C" number="28"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="20"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(3)HexNAc(1)Pent(1)" full_name="Hex3HexNAc1Pent1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:56:02"
                date_time_modified="2006-10-16 17:18:03"
                approved="1"
                record_id="154">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="821.280102" avge_mass="821.7289" composition="Pent Hex(3) HexNAc">
            <umod:element symbol="H" number="51"/>
            <umod:element symbol="C" number="31"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="24"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(2)dHex(1)Pent(1)" full_name="Hex1HexNAc2dHex1Pent1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:57:01"
                date_time_modified="2006-10-16 17:18:41"
                approved="1"
                record_id="155">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="846.311736" avge_mass="846.7815"
                     composition="Pent dHex Hex HexNAc(2)">
            <umod:element symbol="H" number="54"/>
            <umod:element symbol="C" number="33"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="23"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(2)dHex(2)" full_name="Hex1HexNAc2dHex2"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:57:52"
                date_time_modified="2006-10-16 17:18:56"
                approved="1"
                record_id="156">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="860.327386" avge_mass="860.8080" composition="dHex(2) Hex HexNAc(2)">
            <umod:element symbol="H" number="56"/>
            <umod:element symbol="C" number="34"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="23"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(2)HexNAc(2)Pent(1)" full_name="Hex2HexNAc2Pent1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:58:38"
                date_time_modified="2006-10-16 17:19:11"
                approved="1"
                record_id="157">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="862.306651" avge_mass="862.7809" composition="Pent Hex(2) HexNAc(2)">
            <umod:element symbol="H" number="54"/>
            <umod:element symbol="C" number="33"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="24"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(2)HexNAc(2)dHex(1)" full_name="Hex2HexNAc2dHex1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:59:18"
                date_time_modified="2006-10-16 17:19:27"
                approved="1"
                record_id="158">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="876.322301" avge_mass="876.8074" composition="dHex Hex(2) HexNAc(2)">
            <umod:element symbol="H" number="56"/>
            <umod:element symbol="C" number="34"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="24"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(3)HexNAc(2)" full_name="Hex3HexNAc2" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 12:59:59"
                date_time_modified="2006-10-16 17:19:58"
                approved="1"
                record_id="159">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="892.317216" avge_mass="892.8068" composition="Hex(3) HexNAc(2)">
            <umod:element symbol="H" number="56"/>
            <umod:element symbol="C" number="34"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="25"/>
         </umod:delta>
         <umod:alt_name>chitobiose core</umod:alt_name>
      </umod:mod>
      <umod:mod title="Hex(1)HexNAc(1)NeuAc(2)" full_name="Hex1HexNAc1NeuAc2"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 13:01:06"
                date_time_modified="2007-10-20 19:30:21"
                approved="1"
                record_id="160">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="2"/>
         <umod:delta mono_mass="947.323029" avge_mass="947.8423" composition="Hex HexNAc NeuAc(2)">
            <umod:element symbol="H" number="57"/>
            <umod:element symbol="C" number="36"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="26"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Saito T., Itoh T.; Journal of dairy Science, 75 (1992). p1768.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hex(3)HexNAc(2)P(1)" full_name="Hex3HexNAc2P1"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2003-09-29 13:02:02"
                date_time_modified="2006-10-16 17:20:48"
                approved="1"
                record_id="161">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="923.290978" avge_mass="923.7806" composition="P Hex(3) HexNAc(2)">
            <umod:element symbol="H" number="56"/>
            <umod:element symbol="C" number="34"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="25"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Delta:S(-1)Se(1)" full_name="Selenium replaces sulphur"
                username_of_poster="pnacman"
                group_of_poster="users"
                date_time_posted="2003-10-14 11:24:28"
                date_time_modified="2006-10-16 10:11:58"
                approved="1"
                record_id="162">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="Non-standard residue"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Non-standard residue"
                           spec_group="2">
            <umod:misc_notes>Selenocysteine conventionally represented by 1 letter code U</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="47.944449" avge_mass="46.8950" composition="S(-1) Se">
            <umod:element symbol="S" number="-1"/>
            <umod:element symbol="Se" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12148805</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0022</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NBS:13C(6)" full_name="Shimadzu NBS-13C" username_of_poster="kuyama"
                group_of_poster="users"
                date_time_posted="2004-01-07 07:22:34"
                date_time_modified="2007-08-31 10:35:22"
                approved="0"
                record_id="171">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="159.008578" avge_mass="159.1144" composition="H(3) 13C(6) N O(2) S">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>NBS reagent heavy</umod:alt_name>
         <umod:xref>
            <umod:text>Rapid Communications in Mass Spectrometry, 17, 1642-1650 (2003)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12845591</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methyl:2H(3)13C(1)" full_name="monomethylated arginine"
                username_of_poster="sams"
                group_of_poster="users"
                date_time_posted="2005-06-30 18:19:34"
                date_time_modified="2006-10-14 19:40:53"
                approved="1"
                record_id="329">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="18.037835" avge_mass="18.0377" composition="H(-1) 2H(3) 13C">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="13C" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Identifying and quantifying in vivo methylation sites by heavy methyl SILAC, Shao-En Ong et al., Nature methods 1(2) 2004, 1-8</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Dimethyl:2H(6)13C(2)" full_name="dimethylated arginine"
                username_of_poster="sams"
                group_of_poster="users"
                date_time_posted="2005-06-30 18:21:32"
                date_time_modified="2006-10-15 18:26:53"
                approved="1"
                record_id="330">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="36.075670" avge_mass="36.0754" composition="H(-2) 2H(6) 13C(2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="2H" number="6"/>
            <umod:element symbol="13C" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Identifying and quantifying in vivo methylation sites by heavy methyl SILAC, Shao-En Ong et al., Nature Methods 1(2) 1-8</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NBS" full_name="Shimadzu NBS-12C" username_of_poster="kuyama"
                group_of_poster="users"
                date_time_posted="2004-01-07 07:25:07"
                date_time_modified="2007-08-31 10:34:53"
                approved="0"
                record_id="172">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="152.988449" avge_mass="153.1585" composition="H(3) C(6) N O(2) S">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>2-nitrobenzenesulfenyl</umod:alt_name>
         <umod:xref>
            <umod:text>12845591</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Rapid Communications in Mass Spectrometry, 17, 1642-1650 (2003)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:H(1)O(-1)18O(1)" full_name="glycosylated asparagine 18O labeling"
                username_of_poster="lobvi"
                group_of_poster="users"
                date_time_posted="2003-12-11 18:24:58"
                date_time_modified="2006-10-14 09:36:39"
                approved="1"
                record_id="170">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="3.012071" avge_mass="3.0077" composition="H O(-1) 18O">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="18O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>1443554</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Anal. Biochem. 1992, 205:151-158</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Conversion of glycosylated asparagine residues upon deglycosylation with PGNase F in 18O labelled water.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="QAT" full_name="APTA-d0" username_of_poster="s_julka"
                group_of_poster="users"
                date_time_posted="2004-04-08 17:12:14"
                date_time_modified="2006-10-16 15:01:07"
                approved="1"
                record_id="195">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="170.141913" avge_mass="170.2520" composition="H(18) C(9) N(2) O">
            <umod:element symbol="H" number="18"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>(3-acrylamidopropyl)trimethylammonium</umod:alt_name>
         <umod:xref>
            <umod:text>15283597</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="BHT"
                full_name="Michael addition of BHT quinone methide to Cysteine and Lysine"
                username_of_poster="gonzo"
                group_of_poster="users"
                date_time_posted="2004-02-05 22:02:53"
                date_time_modified="2006-10-16 15:19:41"
                approved="1"
                record_id="176">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Other" spec_group="2">
            <umod:misc_notes>Secondary adduct - much less common as C</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1">
            <umod:misc_notes>Secondary adduct - much less common as C</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="3">
            <umod:misc_notes>Primary adduct formed</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="218.167065" avge_mass="218.3346" composition="H(22) C(15) O">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Butylated Hydroxytoluene</umod:alt_name>
         <umod:xref>
            <umod:text>9448752</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>BHT metabolism has been studied in rats and mice in relation to tumor promotion.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Delta:H(4)C(2)O(-1)S(1)" full_name="S-Ethylcystine from Serine"
                username_of_poster="UCDMSF"
                group_of_poster="users"
                date_time_posted="2005-06-20 20:09:02"
                date_time_modified="2006-10-16 10:00:57"
                approved="1"
                record_id="327">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="44.008456" avge_mass="44.1188" composition="H(4) C(2) O(-1) S">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>2005 ASMS poster Presentation TP 527</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Phosphoserine to S-ethylcystine\r\nvia Beta elimination/Michael addition of ethylthiol</umod:misc_notes>
      </umod:mod>
      <umod:mod title="DAET" full_name="phosphorylation to amine thiol"
                username_of_poster="chemgirl18"
                group_of_poster="users"
                date_time_posted="2004-02-11 20:34:16"
                date_time_modified="2006-10-16 12:34:48"
                approved="1"
                record_id="178">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="87.050655" avge_mass="87.1866" composition="H(9) C(4) N O(-1) S">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>b-elimination thiol derivatization</umod:alt_name>
         <umod:xref>
            <umod:text>12216740</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>DAET = 2-(dimethylamino)ethanethiol; The phosphorylation to amine is the beta elimination of phosphate and Michael addition of 2-(dimethylamino)ethanethiol to the site.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Pro-&gt;Pyrrolidone" full_name="Pyrrolidone from Proline"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-02 17:39:05"
                date_time_modified="2006-11-14 11:12:17"
                approved="0"
                record_id="369">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="-27.994915" avge_mass="-28.0101" composition="C(-1) O(-1)">
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(9)" full_name="13C(9) Silac label" username_of_poster="hs"
                group_of_poster="users"
                date_time_posted="2004-02-16 21:19:47"
                date_time_modified="2007-08-22 18:31:52"
                approved="1"
                record_id="184">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:delta mono_mass="9.030193" avge_mass="8.9339" composition="C(-9) 13C(9)">
            <umod:element symbol="C" number="-9"/>
            <umod:element symbol="13C" number="9"/>
         </umod:delta>
         <umod:alt_name>heavy tyrosine</umod:alt_name>
         <umod:xref>
            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(9)+Phospho" full_name="C13 label (Phosphotyrosine)"
                username_of_poster="hs"
                group_of_poster="users"
                date_time_posted="2004-02-22 04:42:33"
                date_time_modified="2006-10-16 12:37:51"
                approved="1"
                record_id="185">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="88.996524" avge_mass="88.9138" composition="H C(-9) 13C(9) O(3) P">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="-9"/>
            <umod:element symbol="13C" number="9"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:alt_name>heavy phosphotyrosine</umod:alt_name>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(6)" full_name="13C(6) Silac label" username_of_poster="hs"
                group_of_poster="users"
                date_time_posted="2004-02-28 19:54:10"
                date_time_modified="2007-08-22 18:29:56"
                approved="1"
                record_id="188">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="Isotopic label"
                           spec_group="5">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="2">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="6.020129" avge_mass="5.9559" composition="C(-6) 13C(6)">
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="13C" number="6"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="HPG" full_name="Hydroxyphenylglyoxal arginine"
                username_of_poster="gcarven"
                group_of_poster="users"
                date_time_posted="2004-02-26 20:19:25"
                date_time_modified="2006-10-17 11:46:39"
                approved="1"
                record_id="186">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="132.021129" avge_mass="132.1162" composition="H(4) C(8) O(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>HPG arginine</umod:alt_name>
         <umod:xref>
            <umod:text>11698400</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11914093</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="2HPG" full_name="2 Hydroxyphenylglyoxal arginine"
                username_of_poster="gcarven"
                group_of_poster="users"
                date_time_posted="2004-02-26 22:05:25"
                date_time_modified="2006-10-17 11:46:56"
                approved="1"
                record_id="187">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="282.052824" avge_mass="282.2476" composition="H(10) C(16) O(5)">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:alt_name>2 HPG arginine</umod:alt_name>
         <umod:xref>
            <umod:text>11698400</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>OH-PGO and PGO react with arginine at a stoichiometry of 2:1</umod:misc_notes>
      </umod:mod>
      <umod:mod title="QAT:2H(3)" full_name="APTA d3" username_of_poster="s_julka"
                group_of_poster="users"
                date_time_posted="2004-04-08 17:15:04"
                date_time_modified="2006-10-16 15:01:35"
                approved="1"
                record_id="196">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="174.168569" avge_mass="174.2784"
                     composition="H(16) 2H(3) C(9) N(2) O">
            <umod:element symbol="H" number="16"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>(3-acrylamidopropyl)trimethylammonium</umod:alt_name>
         <umod:xref>
            <umod:text>15283597</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:18O(2)" full_name="O18 label at both C-terminal oxygens"
                username_of_poster="Hensbergen"
                group_of_poster="users"
                date_time_posted="2004-03-30 14:20:29"
                date_time_modified="2006-11-14 12:01:04"
                approved="1"
                record_id="193">
         <umod:specificity hidden="0" site="C-term" position="Any C-term" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="4.008491" avge_mass="3.9995" composition="O(-2) 18O(2)">
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="18O" number="2"/>
         </umod:delta>
         <umod:alt_name>Double O18 (C-term)</umod:alt_name>
         <umod:xref>
            <umod:text>11467524</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="AccQTag" full_name="6-aminoquinolyl-N-hydroxysuccinimidyl carbamate"
                username_of_poster="davidcreasy"
                group_of_poster="users"
                date_time_posted="2004-04-08 12:01:19"
                date_time_modified="2006-10-16 14:59:12"
                approved="1"
                record_id="194">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="170.048013" avge_mass="170.1674" composition="H(6) C(10) N(2) O">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Waters Application Note 930494</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www2.waters.com/watprod.nsf/newdocs/930494</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>14997490</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Hochleitner, E. O. et al, Proteomics 2004, 4, 669-676,</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Dimethyl:2H(4)" full_name="DiMethyl-CHD2" username_of_poster="PhilipHsu"
                group_of_poster="users"
                date_time_posted="2004-04-20 07:07:29"
                date_time_modified="2006-10-15 18:24:07"
                approved="1"
                record_id="199">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Isotopic label"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="32.056407" avge_mass="32.0778" composition="2H(4) C(2)">
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="2"/>
         </umod:delta>
         <umod:alt_name>reductive amination</umod:alt_name>
         <umod:xref>
            <umod:text>Anal Chem 2003. 75, 6843</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>14670044</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Jue-Liang Hsu, Sheng-Yu Huang, and Shu-Hui Chen. Stable-Isotope based Multiplex Labeling Coupled with LC-MS/MS, HUPO 3rd ANNUAL WORLD CONGRESS, Bejing (China) 2004</umod:text>
            <umod:source>Book</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="EQAT" full_name="EAPTA d0" username_of_poster="s_julka"
                group_of_poster="users"
                date_time_posted="2004-04-08 17:21:08"
                date_time_modified="2006-10-16 15:05:02"
                approved="1"
                record_id="197">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="184.157563" avge_mass="184.2786" composition="H(20) C(10) N(2) O">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="EQAT:2H(5)" full_name="EAPTA d5" username_of_poster="s_julka"
                group_of_poster="users"
                date_time_posted="2004-04-08 17:25:24"
                date_time_modified="2006-10-16 15:07:31"
                approved="1"
                record_id="198">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="189.188947" avge_mass="189.3094"
                     composition="H(15) 2H(5) C(10) N(2) O">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="2H" number="5"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ethanedithiol" full_name="EDT" username_of_poster="take"
                group_of_poster="users"
                date_time_posted="2004-04-20 08:27:30"
                date_time_modified="2006-10-16 11:07:38"
                approved="1"
                record_id="200">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="75.980527" avge_mass="76.1838" composition="H(4) C(2) O(-1) S(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>11507762</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NEIAA:2H(5)" full_name="N-ethyl iodoacetamide-d5"
                username_of_poster="Botting"
                group_of_poster="users"
                date_time_posted="2004-05-18 11:11:52"
                date_time_modified="2006-10-16 12:38:09"
                approved="1"
                record_id="212">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="90.084148" avge_mass="90.1353" composition="H(2) 2H(5) C(4) N O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="2H" number="5"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12766232</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:H(6)C(6)O(1)" full_name="Acrolein addition +94"
                username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-05-06 18:54:17"
                date_time_modified="2006-10-16 12:38:28"
                approved="1"
                record_id="205">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="94.041865" avge_mass="94.1112" composition="H(6) C(6) O">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Acrolein94, FDP</umod:alt_name>
      </umod:mod>
      <umod:mod title="Delta:H(4)C(3)O(1)" full_name="Acrolein addition +56"
                username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-05-06 18:55:58"
                date_time_modified="2006-10-16 10:16:29"
                approved="1"
                record_id="206">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="56.026215" avge_mass="56.0633" composition="H(4) C(3) O">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Acrolein56</umod:alt_name>
         <umod:xref>
            <umod:text>10825247</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15541752</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:H(2)C(3)" full_name="Acrolein addition +38"
                username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-05-06 18:57:08"
                date_time_modified="2006-10-15 18:30:31"
                approved="1"
                record_id="207">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="38.015650" avge_mass="38.0480" composition="H(2) C(3)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="3"/>
         </umod:delta>
         <umod:alt_name>Acrolein38</umod:alt_name>
      </umod:mod>
      <umod:mod title="Delta:H(4)C(6)" full_name="Acrolein addition +76"
                username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-05-06 18:59:23"
                date_time_modified="2006-10-16 11:08:13"
                approved="1"
                record_id="208">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="76.031300" avge_mass="76.0960" composition="H(4) C(6)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="6"/>
         </umod:delta>
         <umod:alt_name>Acrolein76</umod:alt_name>
      </umod:mod>
      <umod:mod title="Delta:H(8)C(6)O(2)" full_name="Acrolein addition +112"
                username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-05-06 19:00:25"
                date_time_modified="2006-10-16 12:46:03"
                approved="1"
                record_id="209">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="112.052430" avge_mass="112.1265" composition="H(8) C(6) O(2)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>Acrolein112</umod:alt_name>
      </umod:mod>
      <umod:mod title="ADP-Ribosyl" full_name="ADP  Ribose addition"
                username_of_poster="ionjockey"
                group_of_poster="users"
                date_time_posted="2004-05-27 20:53:37"
                date_time_modified="2006-10-16 17:03:46"
                approved="1"
                record_id="213">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Other glycosylation"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Other glycosylation"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other glycosylation"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="541.061110" avge_mass="541.3005"
                     composition="H(21) C(15) N(5) O(13) P(2)">
            <umod:element symbol="H" number="21"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="13"/>
            <umod:element symbol="P" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0237</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0169</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Structure</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://betelgeuse.u-strasbg.fr/DocPARP/DocPARG/images/Structure-pADPR.jpg</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0168</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0231</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15842200</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0295</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>ADP</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NEIAA" full_name="N-ethyl iodoacetamide-d0" username_of_poster="Botting"
                group_of_poster="users"
                date_time_posted="2004-05-18 11:10:37"
                date_time_modified="2006-10-16 12:15:11"
                approved="1"
                record_id="211">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="85.052764" avge_mass="85.1045" composition="H(7) C(4) N O">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12766232</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="iTRAQ4plex"
                full_name="Representative mass and accurate mass for 116 &amp; 117"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2004-06-08 14:04:07"
                date_time_modified="2006-11-14 11:06:16"
                approved="0"
                record_id="214">
         <umod:specificity hidden="0" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="144.102063" avge_mass="144.1544"
                     composition="H(12) C(4) 13C(3) N 15N O">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="13C" number="3"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="15N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>AKA iTRAQ4plex116/7</umod:alt_name>
         <umod:alt_name>Applied Biosystems iTRAQ(TM) multiplexed quantitation chemistry</umod:alt_name>
         <umod:xref>
            <umod:text>Applied Biosystems Chemistry Reference Guide</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://docs.appliedbiosystems.com/pebiodocs/04351918.pdf</umod:url>
         </umod:xref>
         <umod:misc_notes>Different channels have the same nominal mass but slightly different exact masses. Use this value for all channels for quantitation purposes</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Crotonaldehyde" full_name="Crotonaldehyde" username_of_poster="fatcat"
                group_of_poster="users"
                date_time_posted="2004-08-12 19:56:03"
                date_time_modified="2006-10-16 10:35:31"
                approved="1"
                record_id="253">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="70.041865" avge_mass="70.0898" composition="H(6) C(4) O">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>11283024</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Bromo" full_name="bromination" username_of_poster="gerribe"
                group_of_poster="users"
                date_time_posted="2005-09-06 08:31:51"
                date_time_modified="2006-10-16 11:10:31"
                approved="1"
                record_id="340">
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="77.910511" avge_mass="78.8961" composition="H(-1) Br">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="Br" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>BROM</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0179</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0180</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0173</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0176</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0175</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0174</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9033387</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Amino" full_name="Tyrosine oxidation to 2-aminotyrosine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 21:18:23"
                date_time_modified="2006-10-14 10:39:53"
                approved="1"
                record_id="342">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="15.010899" avge_mass="15.0146" composition="H N">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Argbiotinhydrazide"
                full_name="oxidized Arginine biotinylated with biotin hydrazide"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 22:36:58"
                date_time_modified="2006-11-14 12:10:30"
                approved="0"
                record_id="343">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="199.066699" avge_mass="199.2700" composition="H(13) C(9) N O(2) S">
            <umod:element symbol="H" number="13"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Yoo, Byoung-Sam; Regnier, Fred E. Electrophoresis (2004), 25(9), 1334-1341.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15828771</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:18O(1)" full_name="O18 Labeling" username_of_poster="chemgirl18"
                group_of_poster="users"
                date_time_posted="2004-08-27 21:57:17"
                date_time_modified="2006-10-13 18:53:41"
                approved="1"
                record_id="258">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>alkaline phosphatase to dephosphorylate</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Isotopic label"
                           spec_group="2">
            <umod:misc_notes>alkaline phosphatase to dephosphorylate</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>alkaline phosphatase to dephosphorylate</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="C-term" position="Any C-term" classification="Isotopic label"
                           spec_group="4">
            <umod:misc_notes>digesting in labelled water</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="2.004246" avge_mass="1.9998" composition="O(-1) 18O">
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="18O" number="1"/>
         </umod:delta>
         <umod:alt_name>H2 18O Alkaline Phosphatase</umod:alt_name>
         <umod:xref>
            <umod:text>11467524</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(6)15N(2)" full_name="13C(6) 15N(2) Silac label"
                username_of_poster="hs01"
                group_of_poster="users"
                date_time_posted="2004-08-30 16:23:02"
                date_time_modified="2006-10-19 10:30:33"
                approved="1"
                record_id="259">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="8.014199" avge_mass="7.9427" composition="C(-6) 13C(6) N(-2) 15N(2)">
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="15N" number="2"/>
         </umod:delta>
         <umod:alt_name>heavy lysine</umod:alt_name>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Thiophospho" full_name="Thiophosphorylation"
                username_of_poster="mrbladergroen"
                group_of_poster="users"
                date_time_posted="2004-09-01 13:20:58"
                date_time_modified="2006-10-16 12:38:48"
                approved="1"
                record_id="260">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Other" spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="95.943487" avge_mass="96.0455" composition="H O(2) P S">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="P" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12110917</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="SPITC" full_name="4-sulfophenyl isothiocyanate"
                username_of_poster="hatlevig"
                group_of_poster="users"
                date_time_posted="2004-09-14 20:01:29"
                date_time_modified="2006-10-16 15:26:00"
                approved="1"
                record_id="261">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:delta mono_mass="214.971084" avge_mass="215.2495" composition="H(5) C(7) N O(3) S(2)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:alt_name>N-terminal / lysine sulfonation</umod:alt_name>
         <umod:xref>
            <umod:text>Wang et al. 2004. Rapid Commun Mass Spectrom. 18(1):96-102</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Chen et. al. Rapid Commun Mass Spectrom. 2004;18(2):191-8.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Shimadzu application note</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.shimadzu-biotech.net/literature/application_note/202_1.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>14745769</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>14689565</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>16526082</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="IGBP" full_name="Light IDBEST tag for quantitation"
                username_of_poster="zqiao"
                group_of_poster="users"
                date_time_posted="2004-07-26 23:02:04"
                date_time_modified="2006-10-19 11:13:26"
                approved="1"
                record_id="243">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="296.016039" avge_mass="297.1478"
                     composition="H(13) C(12) N(2) O(2) Br">
            <umod:element symbol="H" number="13"/>
            <umod:element symbol="C" number="12"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="Br" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Under construction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.targetdiscovery.com/index.php?topic=prod.idbe</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Target discovery , Inc. IDBEST IGBP user manual</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cytopiloyne" full_name="nucleophilic addtion to cytopiloyne"
                username_of_poster="ymchiang"
                group_of_poster="users"
                date_time_posted="2004-11-10 03:13:23"
                date_time_modified="2006-10-16 16:35:54"
                approved="1"
                record_id="270">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="7"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="362.136553" avge_mass="362.3738" composition="H(22) C(19) O(7)">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="O" number="7"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15549660</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Cytopiloyne is a polyacetylenic glucoside isolated form Bidens pilosa which can modulate T helper cell differentiation. Biotinylated cytopiloyne might be use to identify its receptor in T cell.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Cytopiloyne+water" full_name="nucleophilic addition to cytopiloyne+H2O"
                username_of_poster="ymchiang"
                group_of_poster="users"
                date_time_posted="2004-11-11 05:23:17"
                date_time_modified="2006-10-16 16:37:10"
                approved="1"
                record_id="271">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="7"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="380.147118" avge_mass="380.3891" composition="H(24) C(19) O(8)">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="O" number="8"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15549660</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Cytopiloyne is a polyacetylenic glucoside isolated form Bidens pilosa which can modulated T helper cell differentiation. Biotinylated cytopiloyne might be use to identify its receptor in T cell.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Label:13C(6)15N(4)" full_name="13C(6) 15N(4) Silac label"
                username_of_poster="AFCS"
                group_of_poster="users"
                date_time_posted="2004-10-20 17:49:33"
                date_time_modified="2006-10-19 10:30:51"
                approved="1"
                record_id="267">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="10.008269" avge_mass="9.9296"
                     composition="C(-6) 13C(6) N(-4) 15N(4)">
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="-4"/>
            <umod:element symbol="15N" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(9)15N(1)" full_name="13C(9) 15N(1) Silac label"
                username_of_poster="Deepa"
                group_of_poster="users"
                date_time_posted="2004-11-05 18:51:13"
                date_time_modified="2006-10-19 10:31:10"
                approved="1"
                record_id="269">
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in AQUA experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="10.027228" avge_mass="9.9273" composition="C(-9) 13C(9) N(-1) 15N">
            <umod:element symbol="C" number="-9"/>
            <umod:element symbol="13C" number="9"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="15N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12771378</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:2H(3)" full_name="Trideuteration" username_of_poster="mmolloy"
                group_of_poster="users"
                date_time_posted="2004-09-29 08:52:01"
                date_time_modified="2006-10-14 09:38:54"
                approved="1"
                record_id="262">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>for SILAC expt</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="3.018830" avge_mass="3.0185" composition="H(-3) 2H(3)">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="2H" number="3"/>
         </umod:delta>
         <umod:alt_name>Trideuteration</umod:alt_name>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(5)15N(1)" full_name="13C(5) 15N(1) Silac label"
                username_of_poster="Deepa"
                group_of_poster="users"
                date_time_posted="2004-11-05 18:49:37"
                date_time_modified="2006-10-19 10:30:08"
                approved="1"
                record_id="268">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in AQUA experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="6.013809" avge_mass="5.9567" composition="C(-5) 13C(5) N(-1) 15N">
            <umod:element symbol="C" number="-5"/>
            <umod:element symbol="13C" number="5"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="15N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12771378</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PET" full_name="phosphorylation to pyridyl thiol"
                username_of_poster="vbad"
                group_of_poster="users"
                date_time_posted="2004-10-07 08:55:33"
                date_time_modified="2006-10-16 12:48:51"
                approved="1"
                record_id="264">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="121.035005" avge_mass="121.2028" composition="H(7) C(7) N O(-1) S">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>b-elimination PET derivatisation</umod:alt_name>
         <umod:xref>
            <umod:text>Manfredo Quadroni in: ''Proteome Research: Mass Spectrometry (ed. P.James)'' pp 187-206</umod:text>
            <umod:source>Book</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>PET = 2-[4-pyridyl]ethanethiol. This modification is a chemical derivative, based on a alkaline catalysed beta-elimination of phosphoserines and phosphothreonines and subsequent 1,4-addition of 2-[4-pyridine]ethanethiol. These modified serines and threonines produce in MS/MS a characteristic fragment which can be used for precursor-ion-scan experiments.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="CAF" full_name="sulfonation of N-terminus" username_of_poster="chens002"
                group_of_poster="users"
                date_time_posted="2004-11-16 14:25:33"
                date_time_modified="2007-01-03 19:34:35"
                approved="1"
                record_id="272">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="135.983029" avge_mass="136.1265" composition="H(4) C(3) O(4) S">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>Ettan CAF MALDI</umod:alt_name>
         <umod:xref>
            <umod:text>Anal.Chem 75(7):156A-165A</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15732931</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>16046801</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>N-terminal sulfonation of diglycine to detect ubiquitination sites</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Xlink:SSD"
                full_name="covalent modification of lysine by cross-linking reagent"
                username_of_poster="tom"
                group_of_poster="users"
                date_time_posted="2004-11-16 20:20:17"
                date_time_modified="2006-10-17 11:43:47"
                approved="1"
                record_id="273">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="253.095023" avge_mass="253.2512" composition="H(15) C(12) N O(5)">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="12"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Partis MD et al. 1983 J Prot Chem 2 263-277</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Nitrosyl" full_name="S-nitrosylation" username_of_poster="dengh"
                group_of_poster="users"
                date_time_posted="2004-12-11 00:23:12"
                date_time_modified="2006-10-15 18:00:14"
                approved="1"
                record_id="275">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="28.990164" avge_mass="28.9982" composition="H(-1) N O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0230</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>10442087</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>NTRY</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15688001</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Protein which is posttranslationally modified by the attachment of a nitric oxide group on the sulfur atom of one or more cysteine residues.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="AEBS" full_name="Aminoethylbenzenesulfonylation"
                username_of_poster="plattm"
                group_of_poster="users"
                date_time_posted="2004-12-14 04:38:25"
                date_time_modified="2006-10-16 15:04:42"
                approved="1"
                record_id="276">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Artefact"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Artefact"
                           spec_group="4">
            <umod:misc_notes>Primary site of modification</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N-term" position="Protein N-term" classification="Artefact"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="183.035399" avge_mass="183.2276" composition="H(9) C(8) N O(2) S">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Biochim Biophys Acta. 1996 Feb 16; 1299(3):353-7</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>8597590</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Potential protein modification when using AEBSF (Pefabloc) as a serine protease inhibitor.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Ethanolyl" full_name="Ethanolation of Cys" username_of_poster="knierman"
                group_of_poster="users"
                date_time_posted="2005-01-11 04:26:47"
                date_time_modified="2006-10-16 10:01:41"
                approved="1"
                record_id="278">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>from reaction of SH group with iodoethanol</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="44.026215" avge_mass="44.0526" composition="H(4) C(2) O">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Anal Biochem. 2004 Oct 1;333(1):174-81</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15351294</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>A simplified procedure for the reduction and alkylation of cysteine residues in proteins prior to proteolytic digestion and mass spectral analysis. Hale JE, Butler JP, Gelfanova V, You JS, Knierman MD.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="HMVK"
                full_name="Michael addition of hydroxymethylvinyl ketone to cysteine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-03 15:59:33"
                date_time_modified="2006-10-16 12:15:35"
                approved="1"
                record_id="371">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="86.036779" avge_mass="86.0892" composition="H(6) C(4) O(2)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>hydroxymethylvinyl ketone</umod:alt_name>
         <umod:xref>
            <umod:text>11743741</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Ethyl" full_name="Ethylation" username_of_poster="Qishanl"
                group_of_poster="users"
                date_time_posted="2005-01-27 23:18:07"
                date_time_modified="2006-10-15 17:59:14"
                approved="1"
                record_id="280">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Multiple"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Multiple"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Artefact"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Chemical derivative"
                           spec_group="4"/>
         <umod:delta mono_mass="28.031300" avge_mass="28.0532" composition="H(4) C(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>9629898</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="CoenzymeA" full_name="Cysteine modified Coenzyme A"
                username_of_poster="tremis"
                group_of_poster="users"
                date_time_posted="2005-02-01 17:10:00"
                date_time_modified="2006-10-16 17:15:18"
                approved="1"
                record_id="281">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="765.099560" avge_mass="765.5182"
                     composition="H(34) C(21) N(7) O(16) P(3) S">
            <umod:element symbol="H" number="34"/>
            <umod:element symbol="C" number="21"/>
            <umod:element symbol="N" number="7"/>
            <umod:element symbol="O" number="16"/>
            <umod:element symbol="P" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Structure</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://commons.wikimedia.org/wiki/Image:Coenzyme_a.png</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0306</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methyl+Deamidated" full_name="Deamidation followed by a methylation"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-14 10:39:08"
                date_time_modified="2007-02-04 12:25:42"
                approved="1"
                record_id="528">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:delta mono_mass="14.999666" avge_mass="15.0113" composition="H C N(-1) O">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Glutamate methyl ester</umod:alt_name>
         <umod:xref>
            <umod:text>P02942</umod:text>
            <umod:source>Swiss-Prot</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DEAME</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Anal Chem. 2007 Jan 15;79(2):673-81.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:H(5)C(2)" full_name="Dimethylation of proline residue"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-15 18:02:34"
                date_time_modified="2006-10-15 18:03:16"
                approved="1"
                record_id="529">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="29.039125" avge_mass="29.0611" composition="H(5) C(2)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>DIMETP</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methyl:2H(2)" full_name="Deuterium Methylation of Lysine"
                username_of_poster="Glebivanov"
                group_of_poster="users"
                date_time_posted="2005-02-13 01:26:38"
                date_time_modified="2006-10-14 19:35:54"
                approved="1"
                record_id="284">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="16.028204" avge_mass="16.0389" composition="2H(2) C">
            <umod:element symbol="2H" number="2"/>
            <umod:element symbol="C" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Nature. 2004 Nov 18;432(7015):353-60. Epub 2004 Nov 03</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15525938</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="SulfanilicAcid" full_name="Light Sulfanilic Acid (SA) C12"
                username_of_poster="apanchaud"
                group_of_poster="users"
                date_time_posted="2005-02-17 15:48:07"
                date_time_modified="2006-10-16 14:05:34"
                approved="1"
                record_id="285">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Isotopic label"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="155.004099" avge_mass="155.1744" composition="H(5) C(6) N O(2) S">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>C-Terminal/Glutamate/Aspartate sulfonation</umod:alt_name>
         <umod:xref>
            <umod:text>ASMS 2005: Panchaud et al. (Poster ThP 509) ''Combining protein identification and quantitation: C-terminal isotope-coded tagging''</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="SulfanilicAcid:13C(6)" full_name="Heavy Sulfanilic Acid (SA) C13"
                username_of_poster="apanchaud"
                group_of_poster="users"
                date_time_posted="2005-02-17 15:55:52"
                date_time_modified="2006-10-16 14:08:42"
                approved="1"
                record_id="286">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C-term" position="Any C-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="161.024228" avge_mass="161.1303" composition="H(5) 13C(6) N O(2) S">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>C-Terminal/Glutamate/Aspartate sulfonation</umod:alt_name>
         <umod:xref>
            <umod:text>ASMS 2005: Panchaud et al. (Poster ThP 509) ''Combining protein identification and quantitation: C-terminal isotope-coded tagging''</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9254591</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Biotin-PEO-Amine" full_name="Biotin polyethyleneoxide amine"
                username_of_poster="TBricker1"
                group_of_poster="users"
                date_time_posted="2005-03-02 16:49:17"
                date_time_modified="2006-11-14 11:15:23"
                approved="0"
                record_id="289">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
                           spec_group="2">
            <umod:misc_notes>EDC-coupled modification of D, E and C-terminus</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>EDC-coupled modification of D, E and C-terminus</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
                           spec_group="3">
            <umod:misc_notes>EDC-coupled modification of D, E and C-terminus</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="356.188212" avge_mass="356.4835"
                     composition="H(28) C(16) N(4) O(3) S">
            <umod:element symbol="H" number="28"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Introduction to Protein Labeling</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Proteomics/browse.cfm?fldID=84EBE112-F871-4CA5-807F-47327153CFCB</umod:url>
         </umod:xref>
         <umod:misc_notes>EDC crosslinker is used to couple biotin PEO-amine to carboxyl groups or 5\' phosphate groups</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Trp-&gt;Oxolactone" full_name="Tryptophan oxidation to oxolactone"
                username_of_poster="oxolactone"
                group_of_poster="users"
                date_time_posted="2005-02-25 23:30:20"
                date_time_modified="2006-10-14 10:06:01"
                approved="1"
                record_id="288">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="13.979265" avge_mass="13.9835" composition="H(-2) O">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>7949339</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>The cleavage of a peptide bond between Try-Xxx with oxidation of tryptophan to the oxolactone occurs in the presence of BNPS-skatole. This is a useful method for the chemical cleavage of proteins specifically at tryptophan residues.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Biotin-HPDP" full_name="Pierce EZ-Link Biotin-HPDP"
                username_of_poster="tgreco"
                group_of_poster="users"
                date_time_posted="2005-03-03 22:56:52"
                date_time_modified="2006-11-14 11:14:29"
                approved="0"
                record_id="290">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="428.191582" avge_mass="428.6124"
                     composition="H(32) C(19) N(4) O(3) S(2)">
            <umod:element symbol="H" number="32"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>EZ-Link Biotin-HPDP (N-(6-(Biotinamido)hexyl)-3'-(2'-pyridyldithio)-propionamide</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=01031002</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:Hg(1)" full_name="Mercury Mercaptan" username_of_poster="tgreco"
                group_of_poster="users"
                date_time_posted="2005-03-03 23:53:00"
                date_time_modified="2006-10-16 15:09:18"
                approved="1"
                record_id="291">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="201.970617" avge_mass="200.5900" composition="Hg">
            <umod:element symbol="Hg" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>10695144</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="IodoU-AMP" full_name="Cross-link of (Iodo)-uracil MP with W,F,Y"
                username_of_poster="davidERICanderson"
                group_of_poster="users"
                date_time_posted="2005-03-04 22:57:55"
                date_time_modified="2006-10-16 15:53:06"
                approved="1"
                record_id="292">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3">
            <umod:misc_notes>Used in base/residue interactions (in principle?)</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="2">
            <umod:misc_notes>Used in base/residue interactions (observed)</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>Used in base/residue interactions (in principle?)</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="322.020217" avge_mass="322.1654"
                     composition="H(11) C(9) N(2) O(9) P">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="9"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:alt_name>UV induced cross-link product of Iodo-U-amp with WFY</umod:alt_name>
         <umod:xref>
            <umod:text>6540775</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11112526</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11567090</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>One note about this chemistry is that for W you have to take care of O2 big time (and extract the I-uracil monophosphate with organics to get rid of residual iodide).</umod:misc_notes>
      </umod:mod>
      <umod:mod title="CAMthiopropanoyl" full_name="3-(carbamidomethylthio)propanoyl"
                username_of_poster="vanschra"
                group_of_poster="users"
                date_time_posted="2005-03-09 15:22:46"
                date_time_modified="2006-10-16 13:58:55"
                approved="1"
                record_id="293">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="145.019749" avge_mass="145.1796" composition="H(7) C(5) N O(2) S">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>3-thiopropanoyl moiety from reduced DSP crosslinker or NHS-SS-biotin, modified with Iodoacetamide</umod:alt_name>
         <umod:xref>
            <umod:text>Peirce MJ, Wait R, Begum S, Saklatvala J, Cope AP (2004) Mol Cell Proteomics 3: 56-65</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Swaim CL, Smith JB, Smith DL (2004) J Am Soc Mass Spectrom 15:736-749</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15121203</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="IED-Biotin" full_name="biotinoyl-iodoacetyl-ethylenediamine"
                username_of_poster="alexey"
                group_of_poster="users"
                date_time_posted="2005-03-10 16:28:09"
                date_time_modified="2006-10-16 15:53:29"
                approved="1"
                record_id="294">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="326.141261" avge_mass="326.4145"
                     composition="H(22) C(14) N(4) O(3) S">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="14"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>10906242</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="dHex" full_name="Fucose" username_of_poster="rsack"
                group_of_poster="users"
                date_time_posted="2005-03-22 16:57:00"
                date_time_modified="2006-10-16 14:02:33"
                approved="1"
                record_id="295">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="146.057909" avge_mass="146.1412" composition="dHex">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:alt_name>deoxyhexose</umod:alt_name>
         <umod:xref>
            <umod:text>15189151</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Mormann, M., Macek, B., Gonzalez de Peredo, A., Hofsteenge, J., Peter-Katalinic, J. (2004). ''Structural studies on protein O-fucosylation by electron capture dissoziation.'' International Journal of Mass Spectrometry 234:11-21</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11344537</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methyl:2H(3)" full_name="deuterated methyl ester"
                username_of_poster="ndacoyas"
                group_of_poster="users"
                date_time_posted="2005-03-24 16:31:28"
                date_time_modified="2006-10-14 19:36:59"
                approved="1"
                record_id="298">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Isotopic label"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C-term" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="17.034480" avge_mass="17.0451" composition="H(-1) 2H(3) C">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="1"/>
         </umod:delta>
         <umod:misc_notes>esterification of carboxylic acids using D3-Methanolic HCl</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Carboxy" full_name="Carboxylation" username_of_poster="Carol"
                group_of_poster="users"
                date_time_posted="2005-03-29 22:55:44"
                date_time_modified="2006-11-14 11:08:50"
                approved="0"
                record_id="299">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="4">
            <umod:misc_notes>Gamma-carboxylation</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="3">
            <umod:misc_notes>Gamma-carboxylation</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="M" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="5"/>
         <umod:delta mono_mass="43.989829" avge_mass="44.0095" composition="C O(2)">
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0114</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>GGLU</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0363</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0032</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>3802193</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0304</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Bromobimane" full_name="Monobromobimane derivative"
                username_of_poster="catsriku"
                group_of_poster="users"
                date_time_posted="2005-04-04 23:03:13"
                date_time_modified="2006-10-16 15:07:49"
                approved="1"
                record_id="301">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="190.074228" avge_mass="190.1986" composition="H(10) C(10) N(2) O(2)">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>mBromobimane</umod:alt_name>
         <umod:xref>
            <umod:text>7856876</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Menadione" full_name="Menadione quinone derivative"
                username_of_poster="catsriku"
                group_of_poster="users"
                date_time_posted="2005-04-04 23:21:29"
                date_time_modified="2007-07-12 07:36:32"
                approved="0"
                record_id="302">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="170.036779" avge_mass="170.1641" composition="H(6) C(11) O(2)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="11"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>Vitamin k3 (Q)</umod:alt_name>
         <umod:xref>
            <umod:text>15939799</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="DeStreak" full_name="Cysteine mercaptoethanol"
                username_of_poster="harald"
                group_of_poster="users"
                date_time_posted="2005-04-11 14:06:08"
                date_time_modified="2006-10-16 11:07:55"
                approved="1"
                record_id="303">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="75.998285" avge_mass="76.1176" composition="H(4) C(2) O S">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12442261</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="dHex(1)Hex(3)HexNAc(4)"
                full_name="Fucosylated biantennary (-2 galactose)"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 18:20:12"
                date_time_modified="2006-10-16 17:22:46"
                approved="1"
                record_id="305">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="1444.533870" avge_mass="1445.3331"
                     composition="dHex Hex(3) HexNAc(4)">
            <umod:element symbol="H" number="92"/>
            <umod:element symbol="C" number="56"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="39"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="dHex(1)Hex(4)HexNAc(4)"
                full_name="Fucosylated biantennary (-1 galactose)"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 19:22:11"
                date_time_modified="2006-10-16 17:23:48"
                approved="1"
                record_id="307">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="1606.586693" avge_mass="1607.4737"
                     composition="dHex Hex(4) HexNAc(4)">
            <umod:element symbol="H" number="102"/>
            <umod:element symbol="C" number="62"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="44"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="dHex(1)Hex(5)HexNAc(4)" full_name="Fucosylated biantennary"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 19:25:17"
                date_time_modified="2006-10-16 17:24:49"
                approved="1"
                record_id="308">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="1768.639517" avge_mass="1769.6143"
                     composition="dHex Hex(5) HexNAc(4)">
            <umod:element symbol="H" number="112"/>
            <umod:element symbol="C" number="68"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="49"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(3)HexNAc(4)" full_name="Biantennary (-2 galactose)"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 19:27:51"
                date_time_modified="2006-10-16 17:22:29"
                approved="1"
                record_id="309">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="1298.475961" avge_mass="1299.1919" composition="Hex(3) HexNAc(4)">
            <umod:element symbol="H" number="82"/>
            <umod:element symbol="C" number="50"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="35"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(4)HexNAc(4)" full_name="Biantennary (-1 galactose)"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 19:33:37"
                date_time_modified="2006-10-16 17:23:05"
                approved="1"
                record_id="310">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="1460.528784" avge_mass="1461.3325" composition="Hex(4) HexNAc(4)">
            <umod:element symbol="H" number="92"/>
            <umod:element symbol="C" number="56"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="40"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Hex(5)HexNAc(4)" full_name="Biantennary" username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 19:35:54"
                date_time_modified="2006-10-16 17:24:34"
                approved="1"
                record_id="311">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="1622.581608" avge_mass="1623.4731" composition="Hex(5) HexNAc(4)">
            <umod:element symbol="H" number="102"/>
            <umod:element symbol="C" number="62"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="45"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Cysteinyl" full_name="Cysteinylation" username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 19:59:43"
                date_time_modified="2006-12-17 11:28:36"
                approved="1"
                record_id="312">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Multiple"
                           spec_group="1"/>
         <umod:delta mono_mass="119.004099" avge_mass="119.1423" composition="H(5) C(3) N O(2) S">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0025</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Lys-loss" full_name="Loss of C-terminal K from Heavy Chain of MAb"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 20:05:38"
                date_time_modified="2006-10-13 15:00:47"
                approved="1"
                record_id="313">
         <umod:specificity hidden="1" site="K" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-128.094963" avge_mass="-128.1723"
                     composition="H(-12) C(-6) N(-2) O(-1)">
            <umod:element symbol="H" number="-12"/>
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>16078144</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Nmethylmaleimide" full_name="Nmethylmaleimide"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-04-25 20:12:24"
                date_time_modified="2006-10-16 17:26:09"
                approved="1"
                record_id="314">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="111.032028" avge_mass="111.0987" composition="H(5) C(5) N O(2)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="CyDye-Cy3" full_name="Cy3 CyDye DIGE Fluor saturation dye"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2006-03-27 11:17:51"
                date_time_modified="2006-10-17 14:18:38"
                approved="0"
                record_id="494">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="672.298156" avge_mass="672.8335"
                     composition="H(44) C(37) N(4) O(6) S">
            <umod:element symbol="H" number="44"/>
            <umod:element symbol="C" number="37"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Amersham (GE Healthcare) instruction leaflet 25800983PL Rev-B, 2003</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12872219</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="DimethylpyrroleAdduct" full_name="2,5-dimethypyrrole"
                username_of_poster="Qishanl"
                group_of_poster="users"
                date_time_posted="2005-05-07 03:11:23"
                date_time_modified="2006-10-16 11:14:22"
                approved="1"
                record_id="316">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="78.046950" avge_mass="78.1118" composition="H(6) C(6)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="6"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Delta:H(2)C(5)" full_name="MDA adduct +62" username_of_poster="rkupfer"
                group_of_poster="users"
                date_time_posted="2005-05-12 22:00:21"
                date_time_modified="2006-10-16 10:29:55"
                approved="1"
                record_id="318">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="62.015650" avge_mass="62.0694" composition="H(2) C(5)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="5"/>
         </umod:delta>
         <umod:alt_name>MDA62</umod:alt_name>
         <umod:misc_notes>usually major adduct formed from malondialdehyde (MDA) with the amino group of lysine residues</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Delta:H(2)C(3)O(1)" full_name="MDA adduct +54"
                username_of_poster="rkupfer"
                group_of_poster="users"
                date_time_posted="2005-05-12 22:12:10"
                date_time_modified="2006-10-16 10:15:34"
                approved="1"
                record_id="319">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>Malondialdehyde (MDA) adduct</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="2">
            <umod:misc_notes>5-hydro-5-methylimidazol-4-one, Methylglyoxal adduct</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="54.010565" avge_mass="54.0474" composition="H(2) C(3) O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>MDA54</umod:alt_name>
         <umod:xref>
            <umod:text>Uchida K, Sakai K, Itakura K, Osawa T, Toyokuni S. 1977. Protein modification by lipid peroxidation products: formation of malondialdehyde-derived N(epsilon)-(2-propenol)lysine in proteins. Arch Biochem Biophys. 346(1):45-52</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Nethylmaleimide+water" full_name="Nethylmaleimidehydrolysis"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2005-05-16 22:18:42"
                date_time_modified="2006-10-17 11:40:14"
                approved="1"
                record_id="320">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="143.058243" avge_mass="143.1406" composition="H(9) C(6) N O(3)">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Chemistry of Protein Conjugation and Crosslinking by Shan S. Wong, 1991, pg.32</umod:text>
            <umod:source>Book</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methyl+Acetyl:2H(3)"
                full_name="Mono-methylated lysine labelled with Acetyl_heavy"
                username_of_poster="buchanan"
                group_of_poster=""
                date_time_posted="2007-08-06 09:35:40"
                date_time_modified="2007-09-07 16:56:17"
                approved="0"
                record_id="768">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="59.045045" avge_mass="59.0817" composition="H 2H(3) C(3) O">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Xlink:B10621" full_name="bis-N-I-sulfonerahodamine"
                username_of_poster="dengh"
                group_of_poster="users"
                date_time_posted="2005-05-17 22:56:12"
                date_time_modified="2006-10-16 17:12:41"
                approved="1"
                record_id="323">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="713.093079" avge_mass="713.5626"
                     composition="H(30) C(31) N(4) O(6) S I">
            <umod:element symbol="H" number="30"/>
            <umod:element symbol="C" number="31"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
            <umod:element symbol="I" number="1"/>
         </umod:delta>
         <umod:misc_notes>Invitrogen X-link reagent</umod:misc_notes>
      </umod:mod>
      <umod:mod title="DTBP" full_name="dimethyl 3,3\'-dithiobispropionimidate"
                username_of_poster="takesin"
                group_of_poster="users"
                date_time_posted="2005-05-18 08:43:26"
                date_time_modified="2006-11-14 11:16:21"
                approved="0"
                record_id="324">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Chemical derivative"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="87.014270" avge_mass="87.1435" composition="H(5) C(3) N S">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Pierce data sheet</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/files/0668ss5.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>770170</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>imidoester cross-linker</umod:misc_notes>
      </umod:mod>
      <umod:mod title="FP-Biotin"
                full_name="10-ethoxyphosphinyl-N-(biotinamidopentyl)decanamide"
                username_of_poster="lmschopfer"
                group_of_poster="users"
                date_time_posted="2005-05-19 22:01:37"
                date_time_modified="2007-01-10 16:18:52"
                approved="0"
                record_id="325">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="572.316129" avge_mass="572.7405"
                     composition="H(49) C(27) N(4) O(5) P S">
            <umod:element symbol="H" number="49"/>
            <umod:element symbol="C" number="27"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="P" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>O-ethyl-N-(biotinamidopentyl)decanamido phosphonate</umod:alt_name>
         <umod:xref>
            <umod:text>10611275</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Liu, Patricelli and Cravatt; Activity-based protein profiling:  The serine hydrolases.  Proc Natl Acad Sci USA 96, 14694-14699 (1999)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Schopfer, Champion, Tamblyn, Thompson and Lockridge;  Characteristic mass spectral fragments of the organophosphorus agent FP-biotin and FP-biotinylated peptides from trypsin and bovine albumin (Tyr410).  Anal Biochem 345, 122-132 (2005)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>FP-biotin was designed to label the active site serine of serine esterases/proteases.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Thiophos-S-S-biotin" full_name="thiophosphate labeled with biotin-HPDP"
                username_of_poster="lparker"
                group_of_poster="users"
                date_time_posted="2005-07-21 16:37:10"
                date_time_modified="2006-10-16 17:02:42"
                approved="1"
                record_id="332">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3">
            <umod:NeutralLoss mono_mass="525.142894" avge_mass="525.6658" flag="false"
                              composition="H(34) C(19) N(4) O(5) P S(3)">
               <umod:element symbol="H" number="34"/>
               <umod:element symbol="C" number="19"/>
               <umod:element symbol="N" number="4"/>
               <umod:element symbol="O" number="5"/>
               <umod:element symbol="P" number="1"/>
               <umod:element symbol="S" number="3"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2">
            <umod:NeutralLoss mono_mass="525.142894" avge_mass="525.6658" flag="false"
                              composition="H(34) C(19) N(4) O(5) P S(3)">
               <umod:element symbol="H" number="34"/>
               <umod:element symbol="C" number="19"/>
               <umod:element symbol="N" number="4"/>
               <umod:element symbol="O" number="5"/>
               <umod:element symbol="P" number="1"/>
               <umod:element symbol="S" number="3"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="525.142894" avge_mass="525.6658" flag="false"
                              composition="H(34) C(19) N(4) O(5) P S(3)">
               <umod:element symbol="H" number="34"/>
               <umod:element symbol="C" number="19"/>
               <umod:element symbol="N" number="4"/>
               <umod:element symbol="O" number="5"/>
               <umod:element symbol="P" number="1"/>
               <umod:element symbol="S" number="3"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="525.142894" avge_mass="525.6658"
                     composition="H(34) C(19) N(4) O(5) P S(3)">
            <umod:element symbol="H" number="34"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="P" number="1"/>
            <umod:element symbol="S" number="3"/>
         </umod:delta>
         <umod:alt_name>Thiophos-biotin disulfide</umod:alt_name>
      </umod:mod>
      <umod:mod title="Can-FP-biotin" full_name="6-N-biotinylaminohexyl isopropyl phosphate"
                username_of_poster="lmschopfer"
                group_of_poster="users"
                date_time_posted="2005-07-21 20:54:00"
                date_time_modified="2007-01-10 16:25:18"
                approved="0"
                record_id="333">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="447.195679" avge_mass="447.5291"
                     composition="H(34) C(19) N(3) O(5) P S">
            <umod:element symbol="H" number="34"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="P" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>O-isopropyl-N-biotinylaminohexyl phosphonate</umod:alt_name>
         <umod:xref>
            <umod:text>Higson, Ferguson and Nikolaev; Synthesis of 6-N-biotinylaminohexyl isopropyl phosphorofluoridate:  A potent tool for the inhibition/isolation of serine esterases and proteases.  Synthesis 3, 407-409 (1999)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Commercially available from Toronto Research Chemicals Inc, as of 2005.  Designed to label the active site serine of serine esterases/proteases.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="HNE+Delta:H(2)" full_name="reduced 4-Hydroxynonenal"
                username_of_poster="rkupfer"
                group_of_poster="users"
                date_time_posted="2005-08-10 20:52:36"
                date_time_modified="2006-10-16 14:07:39"
                approved="1"
                record_id="335">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="158.130680" avge_mass="158.2380" composition="H(18) C(9) O(2)">
            <umod:element symbol="H" number="18"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Crabb JW et al, Protein Sci. 2002;11: 831</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Michael addition adduct of 4-hydroxynonenal with histidine, cystein and lysine residues stabilized by reduction with NaBH4</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Thrbiotinhydrazide"
                full_name="oxidized Threonine biotinylated with biotin hydrazide"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-09-10 23:01:28"
                date_time_modified="2006-11-14 12:12:13"
                approved="0"
                record_id="361">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="240.104482" avge_mass="240.3252" composition="H(16) C(10) N(4) O S">
            <umod:element symbol="H" number="16"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>http://www.piercenet.com/Proteomics/browse.cfm?fldID=84EBE112-F871-4CA5-807F-47327153CFCB</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Yoo, Byoung-Sam; Regnier, Fred E. Electrophoresis (2004), 25(9), 1334-1341</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methylamine" full_name="Michael addition with methylamine"
                username_of_poster="zhulx"
                group_of_poster="users"
                date_time_posted="2005-08-12 21:55:51"
                date_time_modified="2006-10-14 10:02:51"
                approved="1"
                record_id="337">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Artefact"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="13.031634" avge_mass="13.0418" composition="H(3) C N O(-1)">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Rapid Commun. Mass Spectrom. 2002; 16: 999-1001</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Diisopropylphosphate" full_name="O-Diisopropylphosphorylation"
                username_of_poster="lmschopfer"
                group_of_poster="users"
                date_time_posted="2005-09-14 18:05:04"
                date_time_modified="2007-01-15 15:23:33"
                approved="0"
                record_id="362">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="164.060231" avge_mass="164.1394" composition="H(13) C(6) O(3) P">
            <umod:element symbol="H" number="13"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Main; Mode of action of anticholinesterases.  Pharmac Ther 6, 579-628 (1979)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>A selective label for the active site serine of the serine esterase/protease family.  It has also been shown to label tyrosine in serum albumin.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Isopropylphospho" full_name="O-Isopropylphosphorylation"
                username_of_poster="lmschopfer"
                group_of_poster="users"
                date_time_posted="2005-09-14 18:08:20"
                date_time_modified="2007-01-15 15:25:45"
                approved="0"
                record_id="363">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="122.013281" avge_mass="122.0596" composition="H(7) C(3) O(3) P">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Main;  Mode of action of anticholnesterases.  Pharmac Ther 6, 579-628 (1979)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Created by auto-catalytic dealkylation of the O-Diisopropylphosphate adduct.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="ICPL:13C(6)"
                full_name="Bruker Daltonics SERVA-ICPL(TM) quantification chemistry, heavy form"
                username_of_poster="suckau"
                group_of_poster="users"
                date_time_posted="2005-09-19 12:45:52"
                date_time_modified="2008-09-03 15:27:07"
                approved="0"
                record_id="364">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Use when labelling post-digest</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="N-term" position="Protein N-term"
                           classification="Isotopic label"
                           spec_group="2">
            <umod:misc_notes>Use when labelling pre-digest</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="111.041593" avge_mass="111.0500" composition="H(3) 13C(6) N O">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Bruker Daltonics order reference</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.bdal.de/life-science-tools/care-consumables-more/icpl-kit.html</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Schmidt A, Kellermann J, Lottspeich F (2005): A novel strategy for quantitative proteomics using isotope-coded protein labels. Proteomics 5: 4-15</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Attention: As the digest is typically applied AFTER ICPL_light/heavy labeling, only ProteinN-term labeling and Lys-specific labeling is applied.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="ICPL"
                full_name="Bruker Daltonics SERVA-ICPL(TM) quantification chemistry, light form"
                username_of_poster="suckau"
                group_of_poster="users"
                date_time_posted="2005-09-19 13:00:14"
                date_time_modified="2008-09-03 15:26:36"
                approved="0"
                record_id="365">
         <umod:specificity hidden="0" site="N-term" position="Protein N-term"
                           classification="Isotopic label"
                           spec_group="2">
            <umod:misc_notes>Use when labelling pre-digest</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Use when labelling post-digest</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="105.021464" avge_mass="105.0941" composition="H(3) C(6) N O">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Bruker Daltonics order reference</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.bdal.de/life-science-tools/care-consumables-more/icpl-kit.html</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Schmidt A, Kellermann J, Lottspeich F (2005): A novel strategy for quantitative proteomics using isotope-coded protein labels. Proteomics 5: 4-15.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Attention: As the digest is typically applied AFTER ICPL_light/heavy labeling, only ProteinN-term labeling and Lys-specific labeling is applied.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Deamidated:18O(1)" full_name="Deamidation in presence of O18"
                username_of_poster="gerribe"
                group_of_poster="users"
                date_time_posted="2005-09-22 15:30:16"
                date_time_modified="2006-10-14 09:35:33"
                approved="1"
                record_id="366">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="2.988261" avge_mass="2.9845" composition="H(-1) N(-1) 18O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="18O" number="1"/>
         </umod:delta>
         <umod:misc_notes>Observed</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Arg-&gt;Orn" full_name="Ornithine from Arginine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-05 17:55:25"
                date_time_modified="2006-10-13 15:26:33"
                approved="1"
                record_id="372">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="-42.021798" avge_mass="-42.0400" composition="H(-2) C(-1) N(-2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15489230</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cation:Cu[I]" full_name="Replacement of proton by copper"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-16 10:29:12"
                date_time_modified="2006-11-14 10:38:36"
                approved="1"
                record_id="531">
         <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Artefact"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="61.921774" avge_mass="62.5381" composition="H(-1) Cu">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="Cu" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Dehydro" full_name="Half of a disulfide bridge"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-06 20:57:01"
                date_time_modified="2006-10-13 18:28:17"
                approved="1"
                record_id="374">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Multiple"
                           spec_group="1"/>
         <umod:delta mono_mass="-1.007825" avge_mass="-1.0079" composition="H(-1)">
            <umod:element symbol="H" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0025</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Diphthamide" full_name="Diphthamide" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-06 23:21:29"
                date_time_modified="2006-10-16 13:43:13"
                approved="1"
                record_id="375">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="143.118438" avge_mass="143.2068" composition="H(15) C(7) N(2) O">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0040</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DIPH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hydroxyfarnesyl" full_name="hydroxyfarnesyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-07 20:36:20"
                date_time_modified="2006-10-16 15:20:11"
                approved="1"
                record_id="376">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="220.182715" avge_mass="220.3505" composition="H(24) C(15) O">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0103</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FAR0</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Diacylglycerol" full_name="diacylglycerol" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-07 20:41:21"
                date_time_modified="2006-10-16 17:05:40"
                approved="1"
                record_id="377">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="576.511761" avge_mass="576.9334" composition="H(68) C(37) O(4)">
            <umod:element symbol="H" number="68"/>
            <umod:element symbol="C" number="37"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0107</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DIAC</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Carboxyethyl" full_name="carboxyethyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-07 22:18:20"
                date_time_modified="2006-10-16 10:36:16"
                approved="1"
                record_id="378">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="72.021129" avge_mass="72.0627" composition="H(4) C(3) O(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0115</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>CETH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hypusine" full_name="hypusine" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-07 22:20:53"
                date_time_modified="2006-10-16 12:35:24"
                approved="1"
                record_id="379">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="87.068414" avge_mass="87.1204" composition="H(9) C(4) N O">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0116</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>HYPU</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Retinylidene" full_name="retinal" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-07 22:27:27"
                date_time_modified="2006-10-16 15:47:14"
                approved="1"
                record_id="380">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="266.203451" avge_mass="266.4204" composition="H(26) C(20)">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="20"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0120</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Lys-&gt;AminoadipicAcid" full_name="alpha-amino adipic acid"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 17:41:37"
                date_time_modified="2006-10-14 10:33:11"
                approved="1"
                record_id="381">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="14.963280" avge_mass="14.9683" composition="H(-3) N(-1) O(2)">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0122</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cys-&gt;PyruvicAcid" full_name="pyruvic acid from N-term cys"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 17:48:42"
                date_time_modified="2006-10-13 16:42:55"
                approved="1"
                record_id="382">
         <umod:specificity hidden="1" site="C" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-33.003705" avge_mass="-33.0961" composition="H(-3) N(-1) O S(-1)">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0127</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PYRUC</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Ammonia-loss" full_name="Loss of ammonia" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 18:00:01"
                date_time_modified="2007-07-15 20:11:01"
                approved="0"
                record_id="385">
         <umod:specificity hidden="0" site="C" position="Any N-term" classification="Artefact"
                           spec_group="3">
            <umod:misc_notes>Pyro-carbamidomethyl as a delta from Carbamidomethyl-Cys</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="S" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="T" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Chemical derivative"
                           spec_group="4">
            <umod:misc_notes>N-Succinimide</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="-17.026549" avge_mass="-17.0305" composition="H(-3) N(-1)">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="N" number="-1"/>
         </umod:delta>
         <umod:alt_name>oxobutanoic acid from N term Thr</umod:alt_name>
         <umod:alt_name>pyruvic acid from N-term ser</umod:alt_name>
         <umod:xref>
            <umod:text>AA0127</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PYRUS</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0129</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>OXOB</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Phycocyanobilin" full_name="phycocyanobilin" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 18:06:19"
                date_time_modified="2006-10-16 17:07:44"
                approved="1"
                record_id="387">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="586.279135" avge_mass="586.6780" composition="H(38) C(33) N(4) O(6)">
            <umod:element symbol="H" number="38"/>
            <umod:element symbol="C" number="33"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
         <umod:alt_name>phycobiliviolin</umod:alt_name>
         <umod:xref>
            <umod:text>AA0258</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0131</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>phycocyanobilin and phycobiliviolin have different structures but the same empirical formula</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Phycoerythrobilin" full_name="phycoerythrobilin"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 18:08:38"
                date_time_modified="2006-10-16 17:08:02"
                approved="1"
                record_id="388">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="588.294785" avge_mass="588.6939" composition="H(40) C(33) N(4) O(6)">
            <umod:element symbol="H" number="40"/>
            <umod:element symbol="C" number="33"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0132</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Phytochromobilin" full_name="phytochromobilin"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 18:23:58"
                date_time_modified="2006-10-16 17:07:22"
                approved="1"
                record_id="389">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="584.263485" avge_mass="584.6621" composition="H(36) C(33) N(4) O(6)">
            <umod:element symbol="H" number="36"/>
            <umod:element symbol="C" number="33"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0133</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Heme" full_name="heme" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 18:27:20"
                date_time_modified="2006-10-16 17:10:28"
                approved="1"
                record_id="390">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="616.177295" avge_mass="616.4873"
                     composition="H(32) C(34) N(4) O(4) Fe">
            <umod:element symbol="H" number="32"/>
            <umod:element symbol="C" number="34"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="Fe" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0329</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0135</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0276</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Molybdopterin" full_name="molybdopterin" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 18:46:19"
                date_time_modified="2006-10-16 17:02:25"
                approved="1"
                record_id="391">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="521.884073" avge_mass="520.2668"
                     composition="H(11) C(10) N(5) O(8) P S(2) Mo">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="8"/>
            <umod:element symbol="P" number="1"/>
            <umod:element symbol="S" number="2"/>
            <umod:element symbol="Mo" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0142</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Quinone" full_name="quinone" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 18:56:28"
                date_time_modified="2006-10-15 18:03:47"
                approved="1"
                record_id="392">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="29.974179" avge_mass="29.9829" composition="H(-2) O(2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0147</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0148</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>TOPA</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Glucosylgalactosyl" full_name="glucosylgalactosyl hydroxylysine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 19:19:13"
                date_time_modified="2007-12-04 08:55:56"
                approved="1"
                record_id="393">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="324.105647" avge_mass="324.2812" flag="false" composition="Hex(2)">
               <umod:element symbol="H" number="20"/>
               <umod:element symbol="C" number="12"/>
               <umod:element symbol="O" number="10"/>
            </umod:NeutralLoss>
            <umod:NeutralLoss mono_mass="162.052823" avge_mass="162.1406" flag="false" composition="Hex">
               <umod:element symbol="H" number="10"/>
               <umod:element symbol="C" number="6"/>
               <umod:element symbol="O" number="5"/>
            </umod:NeutralLoss>
            <umod:PepNeutralLoss mono_mass="324.105647" avge_mass="324.2812" required="false"
                                 composition="Hex(2)">
               <umod:element symbol="H" number="20"/>
               <umod:element symbol="C" number="12"/>
               <umod:element symbol="O" number="10"/>
            </umod:PepNeutralLoss>
            <umod:PepNeutralLoss mono_mass="162.052823" avge_mass="162.1406" required="false" composition="Hex">
               <umod:element symbol="H" number="10"/>
               <umod:element symbol="C" number="6"/>
               <umod:element symbol="O" number="5"/>
            </umod:PepNeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="340.100562" avge_mass="340.2806" composition="O Hex(2)">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="12"/>
            <umod:element symbol="O" number="11"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0153</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GPIanchor" full_name="glycosylphosphatidylinositol"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 19:31:10"
                date_time_modified="2006-11-14 11:13:52"
                approved="0"
                record_id="394">
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="123.008530" avge_mass="123.0477" composition="H(6) C(2) N O(3) P">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0158</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0159</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0160</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0161</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0162</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0163</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0164</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0165</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0166</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PhosphoribosyldephosphoCoA"
                full_name="phosphoribosyl dephospho-coenzyme A"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 19:42:56"
                date_time_modified="2006-10-16 17:19:42"
                approved="1"
                record_id="395">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="881.146904" avge_mass="881.6335"
                     composition="H(42) C(26) N(7) O(19) P(3) S">
            <umod:element symbol="H" number="42"/>
            <umod:element symbol="C" number="26"/>
            <umod:element symbol="N" number="7"/>
            <umod:element symbol="O" number="19"/>
            <umod:element symbol="P" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0167</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GlycerylPE" full_name="glycerylphosphorylethanolamine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 19:50:17"
                date_time_modified="2006-10-16 15:08:39"
                approved="1"
                record_id="396">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="197.045310" avge_mass="197.1262" composition="H(12) C(5) N O(5) P">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0170</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Triiodothyronine" full_name="triiodo" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 20:08:28"
                date_time_modified="2006-10-16 16:59:19"
                approved="1"
                record_id="397">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="469.716159" avge_mass="469.7850" composition="H C(6) O I(3)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="I" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0177</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>THRN</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Thyroxine" full_name="tetraiodo" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 20:10:14"
                date_time_modified="2006-10-16 17:08:51"
                approved="1"
                record_id="398">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="595.612807" avge_mass="595.6815" composition="C(6) O I(4)">
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="I" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0178</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>THRX</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Tyr-&gt;Dha" full_name="Dehydroalanine (from Tyrosine)"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 20:17:48"
                date_time_modified="2006-10-13 15:02:50"
                approved="1"
                record_id="400">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-94.041865" avge_mass="-94.1112" composition="H(-6) C(-6) O(-1)">
            <umod:element symbol="H" number="-6"/>
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0181</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Didehydro" full_name="2-amino-3-oxo-butanoic_acid"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 20:23:58"
                date_time_modified="2008-07-30 12:01:47"
                approved="1"
                record_id="401">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="2">
            <umod:misc_notes>oxoalanine formylglycine</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Any C-term" classification="Artefact"
                           spec_group="4">
            <umod:misc_notes>Lactone formation from C-terminal hydroxylysine</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="-2.015650" avge_mass="-2.0159" composition="H(-2)">
            <umod:element symbol="H" number="-2"/>
         </umod:delta>
         <umod:alt_name>oxoalanine</umod:alt_name>
         <umod:xref>
            <umod:text>AA0183</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0185</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0365</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>OXOAS</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DHY</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15705169</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cys-&gt;Oxoalanine" full_name="oxoalanine" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 20:29:10"
                date_time_modified="2006-10-17 18:25:23"
                approved="1"
                record_id="402">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-17.992806" avge_mass="-18.0815" composition="H(-2) O S(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:alt_name>formylglycine</umod:alt_name>
         <umod:xref>
            <umod:text>AA0185</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>OXOAC</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Dierks T, Miech C, Hummerjohann J, Schmidt B, Kertesz MA, von Figura K. Posttranslational formation of formylglycine in prokaryotic sulfatases by modification of either cysteine or serine. J. Biol. Chem. 1998; 273: 25 560</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Ser-&gt;LacticAcid" full_name="lactic acid from N-term Ser"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 20:34:16"
                date_time_modified="2006-10-13 17:18:52"
                approved="1"
                record_id="403">
         <umod:specificity hidden="1" site="S" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-15.010899" avge_mass="-15.0146" composition="H(-1) N(-1)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="N" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0186</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GluGlu" full_name="diglutamyl" username_of_poster="vcavett"
                group_of_poster="users"
                date_time_posted="2005-10-18 15:17:59"
                date_time_modified="2006-10-17 13:49:07"
                approved="0"
                record_id="451">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="258.085186" avge_mass="258.2280" composition="H(14) C(10) N(2) O(6)">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
         <umod:xref>
            <umod:text>J. Biol. Chem., Vol. 277, Issue 48, 46140-46144, November 29, 2002</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12356754</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Phosphoadenosine" full_name="AMP binding site"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 21:34:01"
                date_time_modified="2006-10-16 15:53:49"
                approved="1"
                record_id="405">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="329.052520" avge_mass="329.2059"
                     composition="H(12) C(10) N(5) O(6) P">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0371</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0227</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0203</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0267</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Glu" full_name="monoglutamyl" username_of_poster="vcavett"
                group_of_poster="users"
                date_time_posted="2005-10-18 15:07:18"
                date_time_modified="2006-10-17 13:48:54"
                approved="0"
                record_id="450">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="129.042593" avge_mass="129.1140" composition="H(7) C(5) N O(3)">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12356754</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>J. Biol. Chem., Vol. 277, Issue 48, 46140-46144, November 29, 2002</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hydroxycinnamyl" full_name="hydroxycinnamyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 21:40:43"
                date_time_modified="2006-10-16 14:02:07"
                approved="1"
                record_id="407">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="146.036779" avge_mass="146.1427" composition="H(6) C(9) O(2)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0207</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Glycosyl" full_name="glycosyl-L-hydroxyproline"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 21:57:16"
                date_time_modified="2006-10-16 14:03:02"
                approved="1"
                record_id="408">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="148.037173" avge_mass="148.1140" composition="H(8) C(5) O(5)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0212</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="FMNH" full_name="flavin mononucleotide" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 22:09:45"
                date_time_modified="2006-10-16 16:57:46"
                approved="1"
                record_id="409">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="454.088965" avge_mass="454.3279"
                     composition="H(19) C(17) N(4) O(9) P">
            <umod:element symbol="H" number="19"/>
            <umod:element symbol="C" number="17"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="9"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0353</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0220</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0352</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FMNH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Archaeol" full_name="S-diphytanylglycerol diether"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-11 22:15:37"
                date_time_modified="2006-10-16 17:10:59"
                approved="1"
                record_id="410">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="634.662782" avge_mass="635.1417" composition="H(86) C(43) O(2)">
            <umod:element symbol="H" number="86"/>
            <umod:element symbol="C" number="43"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0223</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>ARCH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Phenylisocyanate" full_name="phenyl isocyanate"
                username_of_poster="TING"
                group_of_poster="users"
                date_time_posted="2005-10-14 21:13:16"
                date_time_modified="2006-10-16 12:48:08"
                approved="1"
                record_id="411">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="119.037114" avge_mass="119.1207" composition="H(5) C(7) N O">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Phenylisocyanate:2H(5)" full_name="d5-phenyl isocyanate"
                username_of_poster="TING"
                group_of_poster="users"
                date_time_posted="2005-10-14 21:16:11"
                date_time_modified="2006-10-16 13:35:26"
                approved="1"
                record_id="412">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="124.068498" avge_mass="124.1515" composition="2H(5) C(7) N O">
            <umod:element symbol="2H" number="5"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Phosphoguanosine" full_name="phospho-guanosine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 15:50:03"
                date_time_modified="2006-10-16 16:01:42"
                approved="1"
                record_id="413">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="345.047435" avge_mass="345.2053"
                     composition="H(12) C(10) N(5) O(7) P">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="7"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0325</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0228</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hydroxymethyl" full_name="hydroxymethyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 16:12:56"
                date_time_modified="2006-10-15 18:04:18"
                approved="1"
                record_id="414">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="30.010565" avge_mass="30.0260" composition="H(2) C O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0236</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="MolybdopterinGD+Delta:S(-1)Se(1)"
                full_name="L-selenocysteinyl molybdenum bis(molybdopterin guanine dinucleotide)"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 16:27:56"
                date_time_modified="2006-10-17 11:44:58"
                approved="1"
                record_id="415">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="1620.930224" avge_mass="1618.9096"
                     composition="H(47) C(40) N(20) O(26) P(4) S(3) Se Mo">
            <umod:element symbol="H" number="47"/>
            <umod:element symbol="C" number="40"/>
            <umod:element symbol="N" number="20"/>
            <umod:element symbol="O" number="26"/>
            <umod:element symbol="P" number="4"/>
            <umod:element symbol="S" number="3"/>
            <umod:element symbol="Se" number="1"/>
            <umod:element symbol="Mo" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0248</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Dipyrrolylmethanemethyl" full_name="dipyrrolylmethanemethyl"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 16:33:24"
                date_time_modified="2006-11-14 10:37:01"
                approved="1"
                record_id="416">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="418.137616" avge_mass="418.3973" composition="H(22) C(20) N(2) O(8)">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="8"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0252</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PhosphoUridine" full_name="uridine phosphodiester"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 16:38:18"
                date_time_modified="2006-10-16 15:52:11"
                approved="1"
                record_id="417">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="306.025302" avge_mass="306.1660"
                     composition="H(11) C(9) N(2) O(8) P">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="8"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0256</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Glycerophospho" full_name="glycerophospho" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 17:02:51"
                date_time_modified="2006-10-16 14:03:40"
                approved="1"
                record_id="419">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="154.003110" avge_mass="154.0584" composition="H(7) C(3) O(5) P">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0264</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Carboxy-&gt;Thiocarboxy" full_name="thiocarboxylic acid"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 17:08:53"
                date_time_modified="2006-10-14 10:59:20"
                approved="1"
                record_id="420">
         <umod:specificity hidden="1" site="G" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="15.977156" avge_mass="16.0656" composition="O(-1) S">
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>THIOG</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0265</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Sulfide" full_name="persulfide" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 17:22:45"
                date_time_modified="2006-10-15 18:05:03"
                approved="1"
                record_id="421">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="31.972071" avge_mass="32.0650" composition="S">
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>CYSP</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0269</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PyruvicAcidIminyl" full_name="N-pyruvic acid 2-iminyl"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 17:30:48"
                date_time_modified="2006-10-16 10:35:08"
                approved="1"
                record_id="422">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="V" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="70.005479" avge_mass="70.0468" composition="H(2) C(3) O(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0287</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0274</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0275</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Delta:Se(1)" full_name="selenyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 17:49:48"
                date_time_modified="2006-10-16 11:14:44"
                approved="1"
                record_id="423">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="79.916520" avge_mass="78.9600" composition="Se">
            <umod:element symbol="Se" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0277</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="MolybdopterinGD"
                full_name="molybdenum bis(molybdopterin guanine dinucleotide)"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 17:53:48"
                date_time_modified="2006-10-17 11:44:28"
                approved="1"
                record_id="424">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="1572.985775" avge_mass="1572.0146"
                     composition="H(47) C(40) N(20) O(26) P(4) S(4) Mo">
            <umod:element symbol="H" number="47"/>
            <umod:element symbol="C" number="40"/>
            <umod:element symbol="N" number="20"/>
            <umod:element symbol="O" number="26"/>
            <umod:element symbol="P" number="4"/>
            <umod:element symbol="S" number="4"/>
            <umod:element symbol="Mo" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0281</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0375</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Dioxidation" full_name="dihydroxy" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 17:59:33"
                date_time_modified="2006-10-15 18:19:52"
                approved="1"
                record_id="425">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
                           spec_group="7">
            <umod:misc_notes>trihydroxyphenylalanine</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
                           spec_group="6">
            <umod:misc_notes>tryptophan oxidation to formylkynurenin</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Chemical derivative"
                           spec_group="5">
            <umod:misc_notes>phenylalanine oxidation to dihydroxyphenylalanine</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="M" position="Anywhere" classification="Post-translational"
                           spec_group="4">
            <umod:misc_notes>Sulphone</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="8">
            <umod:misc_notes>sulfinic acid</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="31.989829" avge_mass="31.9988" composition="O(2)">
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12686488</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0262</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>CSIA</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>MSONE</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DIHYDR</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>9252331</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0251</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0370</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0282</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0369</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0263</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Hyun Ae Woo, et. al., Science Vol. 300. no. 5619, pp. 653 - 656</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Octanoyl" full_name="octanoyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 18:04:46"
                date_time_modified="2006-10-16 13:38:44"
                approved="1"
                record_id="426">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="126.104465" avge_mass="126.1962" composition="H(14) C(8) O">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0386</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0290</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>OCTA</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PhosphoHexNAc" full_name="N-acetylglucosamine-1-phosphoryl"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 18:15:16"
                date_time_modified="2006-10-16 15:48:40"
                approved="1"
                record_id="428">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="283.045704" avge_mass="283.1724" composition="H O(3) P HexNAc">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="8"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0296</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PhosphoHex" full_name="phosphoglycosyl-D-mannose-1-phosphoryl"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 18:18:51"
                date_time_modified="2006-10-16 15:48:55"
                approved="1"
                record_id="429">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="242.019154" avge_mass="242.1205" composition="H O(3) P Hex">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="O" number="8"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0297</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Palmitoleyl" full_name="palmitoleyl" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 19:57:30"
                date_time_modified="2006-10-16 15:36:51"
                approved="1"
                record_id="431">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="236.214016" avge_mass="236.3929" composition="H(28) C(16) O">
            <umod:element symbol="H" number="28"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0308</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PALE</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cholesterol" full_name="cholesterol ester" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:00:10"
                date_time_modified="2006-10-16 16:36:21"
                approved="1"
                record_id="432">
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="368.344302" avge_mass="368.6383" composition="H(44) C(27)">
            <umod:element symbol="H" number="44"/>
            <umod:element symbol="C" number="27"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0309</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>CHOL</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Didehydroretinylidene" full_name="3,4-didehydroretinylidene"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:05:19"
                date_time_modified="2006-10-16 15:46:50"
                approved="1"
                record_id="433">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="264.187801" avge_mass="264.4046" composition="H(24) C(20)">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="20"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0312</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="CHDH" full_name="cis-14-hydroxy-10,13-dioxo-7-heptadecenoic ester"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:08:49"
                date_time_modified="2006-10-16 15:49:28"
                approved="1"
                record_id="434">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="294.183109" avge_mass="294.3859" composition="H(26) C(17) O(4)">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="17"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0316</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>CHDH</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methylpyrroline" full_name="4-methyl-delta-1-pyrroline-5-carboxyl"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:21:00"
                date_time_modified="2006-10-16 13:37:33"
                approved="1"
                record_id="435">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="109.052764" avge_mass="109.1259" composition="H(7) C(6) N O">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0321</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>PYRK</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hydroxyheme" full_name="hydroxyheme" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:29:16"
                date_time_modified="2006-10-16 17:10:10"
                approved="1"
                record_id="436">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="614.161645" avge_mass="614.4714"
                     composition="H(30) C(34) N(4) O(4) Fe">
            <umod:element symbol="H" number="30"/>
            <umod:element symbol="C" number="34"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="Fe" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0324</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="MicrocinC7"
                full_name="(3-aminopropyl)(L-aspartyl-1-amino)phosphoryl-5-adenosine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:36:37"
                date_time_modified="2006-10-16 16:40:21"
                approved="1"
                record_id="437">
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="386.110369" avge_mass="386.3003"
                     composition="H(19) C(13) N(6) O(6) P">
            <umod:element symbol="H" number="19"/>
            <umod:element symbol="C" number="13"/>
            <umod:element symbol="N" number="6"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0328</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cyano" full_name="cyano" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:42:40"
                date_time_modified="2006-10-14 19:43:48"
                approved="1"
                record_id="438">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="24.995249" avge_mass="25.0095" composition="H(-1) C N">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0333</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Diironsubcluster" full_name="hydrogenase diiron subcluster"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:46:03"
                date_time_modified="2006-10-16 16:01:22"
                approved="1"
                record_id="439">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="342.786916" avge_mass="342.8760"
                     composition="H(-1) C(5) N(2) O(5) S(2) Fe(2)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="2"/>
            <umod:element symbol="Fe" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0334</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Amidino" full_name="amidino" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 20:49:10"
                date_time_modified="2006-10-15 19:58:03"
                approved="1"
                record_id="440">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="42.021798" avge_mass="42.0400" composition="H(2) C N(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0335</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="FMN" full_name="O3-(riboflavin phosphoryl)" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 21:11:32"
                date_time_modified="2006-10-16 16:47:27"
                approved="1"
                record_id="442">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="438.094051" avge_mass="438.3285"
                     composition="H(19) C(17) N(4) O(8) P">
            <umod:element symbol="H" number="19"/>
            <umod:element symbol="C" number="17"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="8"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0350</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0349</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FMN</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="FMNC" full_name="S-(4a-FMN)" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 21:21:47"
                date_time_modified="2006-10-16 16:58:10"
                approved="1"
                record_id="443">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="456.104615" avge_mass="456.3438"
                     composition="H(21) C(17) N(4) O(9) P">
            <umod:element symbol="H" number="21"/>
            <umod:element symbol="C" number="17"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="9"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0351</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>FMNC</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="CuSMo" full_name="copper sulfido molybdopterin cytosine dinuncleotide"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 21:34:38"
                date_time_modified="2006-10-16 17:20:14"
                approved="1"
                record_id="444">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="922.834855" avge_mass="922.0670"
                     composition="H(24) C(19) N(8) O(15) P(2) S(3) Cu Mo">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="N" number="8"/>
            <umod:element symbol="O" number="15"/>
            <umod:element symbol="P" number="2"/>
            <umod:element symbol="S" number="3"/>
            <umod:element symbol="Mo" number="1"/>
            <umod:element symbol="Cu" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0355</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hydroxytrimethyl" full_name="5-hydroxy-N6,N6,N6-trimethyl"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 21:40:08"
                date_time_modified="2006-10-16 10:28:02"
                approved="1"
                record_id="445">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="59.049690" avge_mass="59.0871" composition="H(7) C(3) O">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0359</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>TRIMETK</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Deoxy" full_name="reduction" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 22:00:35"
                date_time_modified="2006-10-13 17:16:30"
                approved="1"
                record_id="447">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="3">
            <umod:misc_notes>Beta elimination of O-glycosylation under alkaline conditions followed by reduction</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="2">
            <umod:misc_notes>Beta elimination of O-glycosylation under alkaline conditions followed by reduction</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="-15.994915" avge_mass="-15.9994" composition="O(-1)">
            <umod:element symbol="O" number="-1"/>
         </umod:delta>
         <umod:alt_name>Serine to Alanine</umod:alt_name>
         <umod:alt_name>Threonine to a-aminobutyrate</umod:alt_name>
         <umod:xref>
            <umod:text>AA0191</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>14235557</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0373</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Microcin" full_name="microcin E492 siderophore ester from serine"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 22:04:46"
                date_time_modified="2006-10-16 17:18:24"
                approved="1"
                record_id="448">
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="831.197041" avge_mass="831.6871"
                     composition="H(37) C(36) N(3) O(20)">
            <umod:element symbol="H" number="37"/>
            <umod:element symbol="C" number="36"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="20"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0374</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Decanoyl" full_name="lipid" username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2005-10-15 22:14:11"
                date_time_modified="2006-10-16 14:04:24"
                approved="1"
                record_id="449">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="154.135765" avge_mass="154.2493" composition="H(18) C(10) O">
            <umod:element symbol="H" number="18"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>AA0387</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>AA0385</umod:text>
            <umod:source>RESID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>DECA</umod:text>
            <umod:source>FindMod</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GluGluGlu" full_name="triglutamyl" username_of_poster="vcavett"
                group_of_poster="users"
                date_time_posted="2005-10-18 15:21:01"
                date_time_modified="2006-10-17 14:11:11"
                approved="0"
                record_id="452">
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:delta mono_mass="387.127779" avge_mass="387.3419" composition="H(21) C(15) N(3) O(9)">
            <umod:element symbol="H" number="21"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="9"/>
         </umod:delta>
         <umod:xref>
            <umod:text>12356754</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>J. Biol. Chem., Vol. 277, Issue 48, 46140-46144, November 29, 2002</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="GluGluGluGlu" full_name="tetraglutamyl" username_of_poster="vcavett"
                group_of_poster="users"
                date_time_posted="2005-10-18 15:22:24"
                date_time_modified="2006-10-17 14:16:56"
                approved="0"
                record_id="453">
         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
                           classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:delta mono_mass="516.170373" avge_mass="516.4559"
                     composition="H(28) C(20) N(4) O(12)">
            <umod:element symbol="H" number="28"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="12"/>
         </umod:delta>
         <umod:xref>
            <umod:text>J. Biol. Chem., Vol. 277, Issue 48, 46140-46144, November 29, 2002</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12356754</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="HexN" full_name="Hexosamine" username_of_poster="xyuan"
                group_of_poster="users"
                date_time_posted="2005-11-08 18:58:20"
                date_time_modified="2006-10-16 14:09:11"
                approved="1"
                record_id="454">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere"
                           classification="Synth. pep. protect. gp."
                           spec_group="1"/>
         <umod:delta mono_mass="161.068808" avge_mass="161.1558" composition="H(11) C(6) N O(4)">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:alt_name>Galactosamine</umod:alt_name>
         <umod:alt_name>Glucosamine</umod:alt_name>
      </umod:mod>
      <umod:mod title="Xlink:DMP-s" full_name="One end of crosslink attached, one end free"
                username_of_poster="mariana"
                group_of_poster="users"
                date_time_posted="2005-11-08 20:09:24"
                date_time_modified="2006-10-17 13:39:17"
                approved="0"
                record_id="455">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="154.110613" avge_mass="154.2096" composition="H(14) C(8) N(2) O">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Dimethyl pimelimidate</umod:alt_name>
         <umod:xref>
            <umod:text>Imidoester Cross-linkers</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/files/0668ss5.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Packman, L.C. and Perhan, R.N. (1982). Quaternary Structures the Pyruvate Dehydrogenase Multienzyme Complex of Bacillus Stearothermophilus Studies by a New Reversible Crosslinking Procedure with Bis(imidoesters). Biochem. 21, 5171-5175.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Hand, E.S., and Jencks, W.P. (1962). Mechanism of the reaction of imidoesters with amines. J. Am. Chem. Soc. 84, 3505-3514.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Xlink:DMP" full_name="Both ends of crosslink attached to same peptide"
                username_of_poster="mariana"
                group_of_poster="users"
                date_time_posted="2005-11-08 20:15:20"
                date_time_modified="2006-10-17 13:38:09"
                approved="0"
                record_id="456">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Chemical derivative"
                           spec_group="2">
            <umod:misc_notes>Dimethyl pimelimidate, reaction with both ends</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>Dimethyl pimelimidate, reaction with both ends</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="122.084398" avge_mass="122.1677" composition="H(10) C(7) N(2)">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="2"/>
         </umod:delta>
         <umod:alt_name>Dimethyl pimelimidate</umod:alt_name>
         <umod:xref>
            <umod:text>Imidoester Cross-linkers</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/files/0668ss5.pdf</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Hand, E.S., and Jencks, W.P. (1962). Mechanism of the reaction of imidoesters with amines. J. Am. Chem. Soc. 84, 3505-3514.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Packman, L.C. and Perhan, R.N. (1982). Quaternary Structures the Pyruvate Dehydrogenase Multienzyme Complex of Bacillus StearothermophilusStudies by a New Reversible Crosslinking Procedure with Bis(imidoesters). Biochem. 21, 5171-5175.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NDA" full_name="naphthalene-2,3-dicarboxaldehyde"
                username_of_poster="Dekker"
                group_of_poster="users"
                date_time_posted="2005-11-11 11:03:32"
                date_time_modified="2006-10-17 13:41:04"
                approved="0"
                record_id="457">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="175.042199" avge_mass="175.1855" composition="H(5) C(13) N">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="13"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>2081203</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>fluorescent derivative</umod:misc_notes>
      </umod:mod>
      <umod:mod title="SPITC:13C(6)" full_name="4-sulfophenyl isothiocyanate (Heavy C13)"
                username_of_poster="apanchaud"
                group_of_poster="users"
                date_time_posted="2005-12-19 08:37:57"
                date_time_modified="2006-10-16 15:25:36"
                approved="1"
                record_id="464">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="220.991213" avge_mass="221.2054"
                     composition="H(5) C 13C(6) N O(3) S(2)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:alt_name>N-terminal / lysine sulfonation</umod:alt_name>
         <umod:xref>
            <umod:text>16526082</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Lee et al, Rapid Commun Mass Spetrom 2004, 18, 3019-3027</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="TMAB:2H(9)" full_name="d9-4-trimethyllammoniumbutyryl-"
                username_of_poster="xwei"
                group_of_poster="users"
                date_time_posted="2006-02-15 18:36:06"
                date_time_modified="2006-10-17 12:08:34"
                approved="0"
                record_id="477">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2">
            <umod:NeutralLoss mono_mass="68.129990" avge_mass="68.1657" flag="false"
                              composition="2H(9) C(3) N">
               <umod:element symbol="2H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="68.129990" avge_mass="68.1657" flag="false"
                              composition="2H(9) C(3) N">
               <umod:element symbol="2H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="137.164030" avge_mass="137.2476" composition="H(5) 2H(9) C(7) N O">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="2H" number="9"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>J. Mass Spectrom. 2005; 40: 238-249</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="TMAB" full_name="4-trimethyllammoniumbutyryl-" username_of_poster="xwei"
                group_of_poster="users"
                date_time_posted="2006-02-15 03:10:16"
                date_time_modified="2006-10-17 12:08:04"
                approved="0"
                record_id="476">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2">
            <umod:NeutralLoss mono_mass="59.073499" avge_mass="59.1103" flag="false"
                              composition="H(9) C(3) N">
               <umod:element symbol="H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:NeutralLoss mono_mass="59.073499" avge_mass="59.1103" flag="false"
                              composition="H(9) C(3) N">
               <umod:element symbol="H" number="9"/>
               <umod:element symbol="C" number="3"/>
               <umod:element symbol="N" number="1"/>
            </umod:NeutralLoss>
         </umod:specificity>
         <umod:delta mono_mass="128.107539" avge_mass="128.1922" composition="H(14) C(7) N O">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>J. Mass Spectrom. 2005; 40: 238-249</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="FTC" full_name="fluorescein-5-thiosemicarbazide"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2006-02-20 11:15:03"
                date_time_modified="2006-10-16 16:45:27"
                approved="1"
                record_id="478">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="421.073241" avge_mass="421.4259"
                     composition="H(15) C(21) N(3) O(5) S">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="21"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Ahn, B., Rhee, S.G., and Stadtmann, E. R. (1987) Anal. Biochem.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="AEC-MAEC" full_name="aminoethylcysteine" username_of_poster="mpcusack"
                group_of_poster="users"
                date_time_posted="2006-01-20 00:46:08"
                date_time_modified="2007-09-26 22:43:16"
                approved="0"
                record_id="472">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2">
            <umod:misc_notes>pT gives beta-methylaminoethylcysteine</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>pS gives aminoethylcysteine</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="59.019355" avge_mass="59.1334" composition="H(5) C(2) N O(-1) S">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>beta-methylaminoethylcysteine</umod:alt_name>
         <umod:xref>
            <umod:text>Z. A. Knight et al, Nature Biotech., 21(9) 1047-1054 (2003)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Modification procedure used for phosphopeptide mapping</umod:misc_notes>
      </umod:mod>
      <umod:mod title="BADGE" full_name="Bisphenol A diglycidyl ether derivative"
                username_of_poster="TNO"
                group_of_poster="users"
                date_time_posted="2006-03-27 09:30:54"
                date_time_modified="2006-10-17 14:09:11"
                approved="0"
                record_id="493">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Non-standard residue"
                           spec_group="1">
            <umod:misc_notes>found in canned food products</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="340.167459" avge_mass="340.4129" composition="H(24) C(21) O(4)">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="21"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Berger U, Oehme M, Girardin L., Fresenius J Anal Chem. 2001 Jan 2;369(2):115-23.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Found in canned food products</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Label:2H(4)" full_name="4,4,5,5-D4 Lysine" username_of_poster="yunwah"
                group_of_poster="users"
                date_time_posted="2006-02-20 11:44:19"
                date_time_modified="2006-10-17 11:52:44"
                approved="0"
                record_id="481">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="4.025107" avge_mass="4.0246" composition="H(-4) 2H(4)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="2H" number="4"/>
         </umod:delta>
         <umod:alt_name>K4</umod:alt_name>
         <umod:misc_notes>For SILAC experiments</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Hep" full_name="Heptose" username_of_poster="anikolakakis"
                group_of_poster="users"
                date_time_posted="2006-03-24 15:59:43"
                date_time_modified="2006-10-16 15:08:16"
                approved="1"
                record_id="490">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="6"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="5"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="N-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="192.063388" avge_mass="192.1666" composition="Hep">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="CyDye-Cy5" full_name="Cy5 CyDye DIGE Fluor saturation dye"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2006-03-27 11:53:04"
                date_time_modified="2006-10-17 14:18:49"
                approved="0"
                record_id="495">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="684.298156" avge_mass="684.8442"
                     composition="H(44) C(38) N(4) O(6) S">
            <umod:element symbol="H" number="44"/>
            <umod:element symbol="C" number="38"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Amersham (GE Healthcare) instruction leaflet 25800983PL Rev-B, 2003</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>12872219</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="DHP"
                full_name="Dehydropyrrolizidine alkaloid (dehydroretronecine) on cysteines"
                username_of_poster="rowanrainbow"
                group_of_poster="users"
                date_time_posted="2006-03-07 08:40:13"
                date_time_modified="2006-10-17 12:07:19"
                approved="0"
                record_id="488">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="118.065674" avge_mass="118.1558" composition="H(8) C(8) N">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
         <umod:alt_name>Dehydroretronecine</umod:alt_name>
         <umod:xref>
            <umod:text>16222722</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="BHTOH"
                full_name="Michael addition of t-butyl hydroxylated BHT (BHTOH) to C, H or K"
                username_of_poster="rkupfer"
                group_of_poster="users"
                date_time_posted="2006-04-10 19:27:51"
                date_time_modified="2006-10-17 13:42:22"
                approved="0"
                record_id="498">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Other" spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="1">
            <umod:misc_notes>primary adduct</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="3"/>
         <umod:delta mono_mass="234.161980" avge_mass="234.3340" composition="H(22) C(15) O(2)">
            <umod:element symbol="H" number="22"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>t-butyl hydroxylated BHT</umod:alt_name>
         <umod:xref>
            <umod:text>16533022</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>BHTOH is formed upon metabolism of BHT with P450 enzymes. The BHTOH is further metabolized to its quinone methide (electrophile) which reacts with -SH and -NH2 groups</umod:misc_notes>
      </umod:mod>
      <umod:mod title="IGBP:13C(2)" full_name="Heavy IDBEST tag for quantitation"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2006-04-14 18:44:41"
                date_time_modified="2006-10-19 10:48:25"
                approved="1"
                record_id="499">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="298.022748" avge_mass="299.1331"
                     composition="H(13) C(10) 13C(2) N(2) O(2) Br">
            <umod:element symbol="H" number="13"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="13C" number="2"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="Br" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Under construction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.targetdiscovery.com/index.php?topic=prod.idbe</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Target discovery , Inc. IDBEST IGBP user manual</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Nmethylmaleimide+water" full_name="Nmethylmaleimidehydrolysis"
                username_of_poster="whaskins"
                group_of_poster="users"
                date_time_posted="2006-04-14 22:58:34"
                date_time_modified="2006-10-17 12:12:40"
                approved="0"
                record_id="500">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="129.042593" avge_mass="129.1140" composition="H(7) C(5) N O(3)">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Chemistry of Protein Conjugation and Crosslinking by Shan S. Wong, 1991, pg.32</umod:text>
            <umod:source>Book</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PyMIC" full_name="3-methyl-2-pyridyl isocyanate"
                username_of_poster="TING"
                group_of_poster="users"
                date_time_posted="2006-04-18 20:46:17"
                date_time_modified="2006-10-17 12:19:15"
                approved="0"
                record_id="501">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="134.048013" avge_mass="134.1353" composition="H(6) C(7) N(2) O">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="LG-lactam-K" full_name="Levuglandinyl - lysine lactam adduct"
                username_of_poster="alexparf"
                group_of_poster="users"
                date_time_posted="2006-04-27 17:56:39"
                date_time_modified="2006-11-14 12:04:37"
                approved="0"
                record_id="503">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="332.198760" avge_mass="332.4339" composition="H(28) C(20) O(4)">
            <umod:element symbol="H" number="28"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Salomon RG. Antioxid Redox Signal. 2005 Jan-Feb;7(1-2):185-201.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Salomon RG. Chem Phys Lipids. 2005 Mar;134(1):1-20.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15650407</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15752459</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="BisANS"
                full_name="4,4\'-dianilino-1,1\'-binaphthyl-5,5\'-disulfonic acid"
                username_of_poster="app95d"
                group_of_poster="users"
                date_time_posted="2006-07-05 23:31:08"
                date_time_modified="2006-10-17 14:18:24"
                approved="0"
                record_id="519">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="592.076278" avge_mass="592.6410"
                     composition="H(20) C(32) N(2) O(6) S(2)">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="32"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Pierce, A., Dewaal, E., Vanremmen, H., Richardson, A. &amp; Chaudhuri, A. (2006). A Novel Approach for Screening the Proteome for Changes in Protein Conformation. Biochemistry 45, 3077-3085.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Piperidine" full_name="Piperidination" username_of_poster="PhilipHsu"
                group_of_poster="users"
                date_time_posted="2006-07-20 08:37:21"
                date_time_modified="2006-10-17 12:05:44"
                approved="0"
                record_id="520">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="68.062600" avge_mass="68.1170" composition="H(8) C(5)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Jue-Liang Hsu, Sheng-Yu Huang, and Shu-Hui Chen. Stable-Isotope based Multiplex Labeling Coupled with LC-MS/MS, HUPO 3rd ANNUAL WORLD CONGRESS, Bejing (China) 2004</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Diethyl" full_name="Diethylation, analogous to Dimethylation"
                username_of_poster="PhilipHsu"
                group_of_poster="users"
                date_time_posted="2006-06-15 07:18:26"
                date_time_modified="2006-10-17 12:00:33"
                approved="0"
                record_id="518">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="56.062600" avge_mass="56.1063" composition="H(8) C(4)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>J. Proteome Res. 2005, 4, 101-108.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="LG-Hlactam-K" full_name="Levuglandinyl - lysine hydroxylactam adduct"
                username_of_poster="alexparf"
                group_of_poster="users"
                date_time_posted="2006-04-27 18:02:17"
                date_time_modified="2006-11-14 12:04:47"
                approved="0"
                record_id="504">
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Post-translational"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="348.193674" avge_mass="348.4333" composition="H(28) C(20) O(5)">
            <umod:element symbol="H" number="28"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Salomon RG. Antioxid Redox Signal. 2005 Jan-Feb;7(1-2):185-201.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Salomon RG. Chem Phys Lipids. 2005 Mar;134(1):1-20.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15650407</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15752459</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Dimethyl:2H(4)13C(2)" full_name="DiMethyl-C13HD2"
                username_of_poster="oded"
                group_of_poster="users"
                date_time_posted="2006-05-08 22:03:41"
                date_time_modified="2006-10-15 18:26:15"
                approved="1"
                record_id="510">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="34.063117" avge_mass="34.0631" composition="2H(4) 13C(2)">
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="13C" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>16335955</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>J Proteome Res. 2005 Nov-Dec;4(6):2099-108</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="C8-QAT"
                full_name="[3-(2,5)-Dioxopyrrolidin-1-yloxycarbonyl)-propyl]dimethyloctylammonium"
                username_of_poster="amadian"
                group_of_poster="users"
                date_time_posted="2006-05-13 20:55:20"
                date_time_modified="2006-12-03 19:43:27"
                approved="0"
                record_id="513">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="227.224915" avge_mass="227.3862" composition="H(29) C(14) N O">
            <umod:element symbol="H" number="29"/>
            <umod:element symbol="C" number="14"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>16771548</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hex(2)" full_name="Lactosylation" username_of_poster="molle"
                group_of_poster="users"
                date_time_posted="2006-05-11 13:21:17"
                date_time_modified="2006-10-17 13:44:30"
                approved="0"
                record_id="512">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other glycosylation"
                           spec_group="2">
            <umod:misc_notes>Maillard reaction (first event)</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
                           spec_group="1">
            <umod:misc_notes>Maillard reaction (first event)</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="324.105647" avge_mass="324.2812" composition="Hex(2)">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="12"/>
            <umod:element symbol="O" number="10"/>
         </umod:delta>
         <umod:alt_name>lac</umod:alt_name>
         <umod:xref>
            <umod:text>ANALYTICAL BIOCHEMISTRY 259, 152-161 (1998)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>BIOCHIMECAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS 236, 413-417 (1997)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Lactosylation of bovine Beta-Lactoglobulin</umod:misc_notes>
      </umod:mod>
      <umod:mod title="LG-lactam-R" full_name="Levuglandinyl - arginine lactam adduct"
                username_of_poster="alexparf"
                group_of_poster="users"
                date_time_posted="2006-04-27 18:05:11"
                date_time_modified="2006-10-17 14:08:20"
                approved="0"
                record_id="505">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="290.176961" avge_mass="290.3939"
                     composition="H(26) C(19) N(-2) O(4)">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15650407</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15752459</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Salomon RG. Chem Phys Lipids. 2005 Mar;134(1):1-20.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Salomon RG. Antioxid Redox Signal. 2005 Jan-Feb;7(1-2):185-201.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="CLIP_TRAQ_1" full_name="CLIP_TRAQ_1" username_of_poster="overalllab"
                group_of_poster="users"
                date_time_posted="2006-09-15 02:21:17"
                date_time_modified="2006-10-17 18:03:21"
                approved="0"
                record_id="524">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Side reaction, low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="140.094963" avge_mass="140.1830" composition="H(12) C(7) N(2) O">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>CLIP_TRAQ_single</umod:alt_name>
         <umod:misc_notes>CLIP-TRAQ-1 H(17) C(11) N(3) O(4) is an in-house made compound that reacts with primary amines through a N-hydroxysuccinimide group leading to a 140.0949 Da mass shift (monoisotopic) in MS mode. The reporter ion in MS/MS mode is 113 m/z. (See also CLIP-TRAQ-2).</umod:misc_notes>
      </umod:mod>
      <umod:mod title="CLIP_TRAQ_2" full_name="CLIP_TRAQ_2" username_of_poster="overalllab"
                group_of_poster="users"
                date_time_posted="2006-09-15 02:25:46"
                date_time_modified="2006-10-17 18:04:46"
                approved="0"
                record_id="525">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Side reaction, low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="141.098318" avge_mass="141.1756" composition="H(12) C(6) 13C N(2) O">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="13C" number="1"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>CLIP_TRAQ_double</umod:alt_name>
         <umod:misc_notes>CLIP-TRAQ-2 H(17) C(10) C13 N(3) O(4) is an in-house made compound that reacts with primary amines through a N-hydroxysuccinimide group leading to a 141.0983 Da mass shift (monoisotopic) in MS mode. The reporter ion in MS/MS mode can either be 113 or 114 m/z depending on the position of isotopic C13 in the molecule. (Fahlman, R. and Overall, C.M. in preparation).</umod:misc_notes>
      </umod:mod>
      <umod:mod title="LG-Hlactam-R" full_name="Levuglandinyl - arginine hydroxylactam adduct"
                username_of_poster="alexparf"
                group_of_poster="users"
                date_time_posted="2006-04-27 18:08:11"
                date_time_modified="2006-10-17 14:08:30"
                approved="0"
                record_id="506">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="306.171876" avge_mass="306.3933"
                     composition="H(26) C(19) N(-2) O(5)">
            <umod:element symbol="H" number="26"/>
            <umod:element symbol="C" number="19"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15650407</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15752459</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Salomon RG. Chem Phys Lipids. 2005 Mar;134(1):1-20.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Salomon RG. Antioxid Redox Signal. 2005 Jan-Feb;7(1-2):185-201.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Maleimide-PEO2-Biotin" full_name="Maleimide-PEO2-Biotin"
                username_of_poster="ericjohansen"
                group_of_poster="users"
                date_time_posted="2006-08-11 02:49:51"
                date_time_modified="2006-10-17 14:17:58"
                approved="0"
                record_id="522">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="525.225719" avge_mass="525.6183"
                     composition="H(35) C(23) N(5) O(7) S">
            <umod:element symbol="H" number="35"/>
            <umod:element symbol="C" number="23"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="7"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>Maleimide-PEG-Biotin</umod:alt_name>
         <umod:xref>
            <umod:text>EZ-Link Maleimide PEOn-Biotin</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=01031005</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Sulfo-NHS-LC-LC-Biotin" full_name="Sulfo-NHS-LC-LC-Biotin"
                username_of_poster="unimod"
                group_of_poster="admin"
                date_time_posted="2006-08-31 18:01:50"
                date_time_modified="2006-10-17 14:16:14"
                approved="0"
                record_id="523">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="452.245726" avge_mass="452.6106"
                     composition="H(36) C(22) N(4) O(4) S">
            <umod:element symbol="H" number="36"/>
            <umod:element symbol="C" number="22"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>EZ-Link Sulfo-NHS-Biotin Reagents</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=8D38BA83-EFDC-421A-853F-E96EBA380612</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="FNEM" full_name="fluorescein-5-maleimide" username_of_poster="shure"
                group_of_poster="users"
                date_time_posted="2006-06-08 10:07:56"
                date_time_modified="2006-10-17 14:15:03"
                approved="0"
                record_id="515">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>photosensitive</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="427.069202" avge_mass="427.3625" composition="H(13) C(24) N O(7)">
            <umod:element symbol="H" number="13"/>
            <umod:element symbol="C" number="24"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="7"/>
         </umod:delta>
         <umod:alt_name>fluorescein-NEM</umod:alt_name>
         <umod:xref>
            <umod:text>9325338</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11665566</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Thiol-Reactive Probes</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://probes.invitrogen.com/media/pis/mp00003.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PropylNAGthiazoline"
                full_name="propyl-1,2-dideoxy-2\'-methyl-alpha-D-glucopyranoso-[2,1-d]-Delta2\'-thiazoline"
                username_of_poster="mmacaule"
                group_of_poster="users"
                date_time_posted="2006-05-18 18:44:52"
                date_time_modified="2006-11-14 10:35:19"
                approved="0"
                record_id="514">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="232.064354" avge_mass="232.2768" composition="H(14) C(9) N O(4) S">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15795231</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>In a recent publication (see reference), we have shown that family 84 glycoside hydrolases contain a deep pocket beneath the 2-acetamido group of its substrate (N-acetyl-glucosamine). With this strucual feature in mind, we have designed a specific inhibitor that contains a chloride group appended to the end of the propyl chain on a known inhibitor termed propyl-NAG-thiazoline. We have shown kinetically that this molecule is a potent suicide inhibitor of this enzyme famiy and now wish to know the precise residue which is acting as the nucleophile to dispace the choride atom. We have included all residues that are in the vacinity of the chloride atom that could potentially act in a nucleophilic manner.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Dethiomethyl" full_name="Prompt loss of side chain from oxidised Met"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-13 15:14:55"
                date_time_modified="2006-10-13 17:02:27"
                approved="1"
                record_id="526">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="Artefact"
                           spec_group="1"/>
         <umod:delta mono_mass="-48.003371" avge_mass="-48.1075" composition="H(-4) C(-1) S(-1)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>9004526</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>More commonly seen as a neutral loss</umod:misc_notes>
      </umod:mod>
      <umod:mod title="iTRAQ4plex114" full_name="Accurate mass for 114"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-16 13:46:49"
                date_time_modified="2006-12-09 18:48:09"
                approved="0"
                record_id="532">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="144.105918" avge_mass="144.1680"
                     composition="H(12) C(5) 13C(2) N(2) 18O">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="13C" number="2"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="18O" number="1"/>
         </umod:delta>
         <umod:alt_name>Applied Biosystems iTRAQ(TM) multiplexed quantitation chemistry</umod:alt_name>
         <umod:xref>
            <umod:text>Applied Biosystems Chemistry Reference Guide</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://docs.appliedbiosystems.com/pebiodocs/04351918.pdf</umod:url>
         </umod:xref>
         <umod:misc_notes>Different channels have the same nominal mass but slightly different exact masses.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="iTRAQ4plex115" full_name="Accurate mass for 115"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-16 13:48:16"
                date_time_modified="2006-12-09 18:47:52"
                approved="0"
                record_id="533">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="144.099599" avge_mass="144.1688"
                     composition="H(12) C(6) 13C N 15N 18O">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="13C" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="15N" number="1"/>
            <umod:element symbol="18O" number="1"/>
         </umod:delta>
         <umod:alt_name>Applied Biosystems iTRAQ(TM) multiplexed quantitation chemistry</umod:alt_name>
         <umod:xref>
            <umod:text>Applied Biosystems Chemistry Reference Guide</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://docs.appliedbiosystems.com/pebiodocs/04351918.pdf</umod:url>
         </umod:xref>
         <umod:misc_notes>Different channels have the same nominal mass but slightly different exact masses.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Dibromo" full_name="Dibromo" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-16 14:06:38"
                date_time_modified="2006-10-16 14:06:38"
                approved="1"
                record_id="534">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="155.821022" avge_mass="157.7921" composition="H(-2) Br(2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="Br" number="2"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="LeuArgGlyGly" full_name="Ubiquitination" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-10-16 16:39:05"
                date_time_modified="2006-10-16 16:39:05"
                approved="1"
                record_id="535">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="383.228103" avge_mass="383.4460" composition="H(29) C(16) N(7) O(4)">
            <umod:element symbol="H" number="29"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="N" number="7"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:alt_name>Addition of LRGG</umod:alt_name>
      </umod:mod>
      <umod:mod title="CLIP_TRAQ_3" full_name="CLIP_TRAQ_3" username_of_poster="overall"
                group_of_poster=""
                date_time_posted="2006-10-17 18:08:00"
                date_time_modified="2006-10-17 18:11:03"
                approved="0"
                record_id="536">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="271.148736" avge_mass="271.2976"
                     composition="H(20) C(11) 13C N(3) O(4)">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="11"/>
            <umod:element symbol="13C" number="1"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:misc_notes>CLIP_TRAQ_3 (H(20) C(11) C13 N(3) O(4) is an in-house made compound that reacts with primary amines through a N-hydroxysuccinimide group leading to a 155.1 Da mass shift (monoisotopic) in MS mode. The reporter ion in MS/MS mode can either be 127 or 128 m/z depending on the position of isotopic C13 in the molecule. (Fahlman, R. and Overall, C.M. in preparation).</umod:misc_notes>
      </umod:mod>
      <umod:mod title="CLIP_TRAQ_4" full_name="CLIP_TRAQ_4" username_of_poster="overall"
                group_of_poster=""
                date_time_posted="2006-10-17 18:09:22"
                date_time_modified="2006-10-17 18:10:05"
                approved="0"
                record_id="537">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="244.101452" avge_mass="244.2292"
                     composition="H(15) C(9) 13C N(2) O(5)">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="13C" number="1"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="5"/>
         </umod:delta>
         <umod:misc_notes>CLIP_TRAQ_4 is an in-house made compound that reacts with primary amines through a N-hydroxysuccinimide group leading to a 128.1 Da mass shift (monoisotopic) in MS mode. The reporter ion in MS/MS mode can either be 100 or 101 m/z depending on the position of isotopic C13 in the molecule. (Fahlman, R. and Overall, C.M. in preparation).</umod:misc_notes>
      </umod:mod>
      <umod:mod title="15dB-biotin"
                full_name="15-deoxy-delta 12,14-Prostaglandin J2-biotinimide"
                username_of_poster="sevgh"
                group_of_poster=""
                date_time_posted="2006-10-17 18:13:45"
                date_time_modified="2006-10-17 18:13:45"
                approved="0"
                record_id="538">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="626.386577" avge_mass="626.8927"
                     composition="H(54) C(35) N(4) O(4) S">
            <umod:element symbol="H" number="54"/>
            <umod:element symbol="C" number="35"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Cayman Chemical data sheet</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.caymanchem.com/pdfs/10141.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="PGA1-biotin" full_name="Prostaglandin A1-biotinimide"
                username_of_poster="sevgh"
                group_of_poster=""
                date_time_posted="2006-10-17 18:24:06"
                date_time_modified="2006-10-17 18:24:06"
                approved="0"
                record_id="539">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="660.428442" avge_mass="660.9504"
                     composition="H(60) C(36) N(4) O(5) S">
            <umod:element symbol="H" number="60"/>
            <umod:element symbol="C" number="36"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="5"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Cayman Chemical data sheet</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.caymanchem.com/pdfs/10013.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Ala-&gt;Ser" full_name="Ala-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:07:30"
                date_time_modified="2006-11-09 10:07:30"
                approved="0"
                record_id="540">
         <umod:specificity hidden="1" site="A" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="15.994915" avge_mass="15.9994" composition="O">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ala-&gt;Thr" full_name="Ala-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:13:43"
                date_time_modified="2006-11-09 10:13:43"
                approved="0"
                record_id="541">
         <umod:specificity hidden="1" site="A" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="30.010565" avge_mass="30.0260" composition="H(2) C O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ala-&gt;Asp" full_name="Ala-&gt;Asp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:15:05"
                date_time_modified="2006-11-09 10:15:05"
                approved="0"
                record_id="542">
         <umod:specificity hidden="1" site="A" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="43.989829" avge_mass="44.0095" composition="C O(2)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ala-&gt;Pro" full_name="Ala-&gt;Pro substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:16:03"
                date_time_modified="2006-11-09 10:16:03"
                approved="0"
                record_id="543">
         <umod:specificity hidden="1" site="A" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="26.015650" avge_mass="26.0373" composition="H(2) C(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ala-&gt;Gly" full_name="Ala-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:16:35"
                date_time_modified="2006-11-09 10:16:35"
                approved="0"
                record_id="544">
         <umod:specificity hidden="1" site="A" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-14.015650" avge_mass="-14.0266" composition="H(-2) C(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ala-&gt;Glu" full_name="Ala-&gt;Glu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:19:56"
                date_time_modified="2006-11-09 10:19:56"
                approved="0"
                record_id="545">
         <umod:specificity hidden="1" site="A" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="58.005479" avge_mass="58.0361" composition="H(2) C(2) O(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ala-&gt;Val" full_name="Ala-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:20:15"
                date_time_modified="2006-11-09 10:20:15"
                approved="0"
                record_id="546">
         <umod:specificity hidden="1" site="A" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="28.031300" avge_mass="28.0532" composition="H(4) C(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Cys-&gt;Phe" full_name="Cys-&gt;Phe substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:20:41"
                date_time_modified="2006-11-09 10:20:41"
                approved="0"
                record_id="547">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="44.059229" avge_mass="44.0310" composition="H(4) C(6) S(-1)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Cys-&gt;Ser" full_name="Cys-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:21:13"
                date_time_modified="2006-11-09 10:21:13"
                approved="0"
                record_id="548">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-15.977156" avge_mass="-16.0656" composition="O S(-1)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Cys-&gt;Trp" full_name="Cys-&gt;Trp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:21:37"
                date_time_modified="2006-11-09 10:21:37"
                approved="0"
                record_id="549">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="83.070128" avge_mass="83.0670" composition="H(5) C(8) N S(-1)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Cys-&gt;Tyr" full_name="Cys-&gt;Tyr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:22:04"
                date_time_modified="2006-11-09 10:22:04"
                approved="0"
                record_id="550">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="60.054144" avge_mass="60.0304" composition="H(4) C(6) O S(-1)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Cys-&gt;Arg" full_name="Cys-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:22:25"
                date_time_modified="2006-11-09 10:22:25"
                approved="0"
                record_id="551">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="53.091927" avge_mass="53.0428" composition="H(7) C(3) N(3) S(-1)">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Cys-&gt;Gly" full_name="Cys-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:22:43"
                date_time_modified="2006-11-09 10:22:43"
                approved="0"
                record_id="552">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-45.987721" avge_mass="-46.0916" composition="H(-2) C(-1) S(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asp-&gt;Ala" full_name="Asp-&gt;Ala substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:53:54"
                date_time_modified="2006-11-09 10:53:54"
                approved="0"
                record_id="553">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-43.989829" avge_mass="-44.0095" composition="C(-1) O(-2)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asp-&gt;His" full_name="Asp-&gt;His substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:55:25"
                date_time_modified="2006-11-09 10:55:25"
                approved="0"
                record_id="554">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="22.031969" avge_mass="22.0519" composition="H(2) C(2) N(2) O(-2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asp-&gt;Asn" full_name="Asp-&gt;Asn substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:55:49"
                date_time_modified="2006-11-09 10:55:49"
                approved="0"
                record_id="555">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-0.984016" avge_mass="-0.9848" composition="H N O(-1)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asp-&gt;Gly" full_name="Asp-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:56:52"
                date_time_modified="2006-11-09 10:56:52"
                approved="0"
                record_id="556">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-58.005479" avge_mass="-58.0361" composition="H(-2) C(-2) O(-2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asp-&gt;Tyr" full_name="Asp-&gt;Tyr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:58:23"
                date_time_modified="2006-11-09 10:58:23"
                approved="0"
                record_id="557">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="48.036386" avge_mass="48.0859" composition="H(4) C(5) O(-1)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asp-&gt;Glu" full_name="Asp-&gt;Glu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:58:44"
                date_time_modified="2006-11-09 10:58:44"
                approved="0"
                record_id="558">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="14.015650" avge_mass="14.0266" composition="H(2) C">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asp-&gt;Val" full_name="Asp-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 10:59:02"
                date_time_modified="2006-11-09 10:59:02"
                approved="0"
                record_id="559">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-15.958529" avge_mass="-15.9563" composition="H(4) C O(-2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Glu-&gt;Ala" full_name="Glu-&gt;Ala substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:00:54"
                date_time_modified="2006-11-09 11:00:54"
                approved="0"
                record_id="560">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-58.005479" avge_mass="-58.0361" composition="H(-2) C(-2) O(-2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Glu-&gt;Gln" full_name="Glu-&gt;Gln substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:01:29"
                date_time_modified="2006-11-09 11:01:29"
                approved="0"
                record_id="561">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-0.984016" avge_mass="-0.9848" composition="H N O(-1)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Glu-&gt;Asp" full_name="Glu-&gt;Asp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:01:53"
                date_time_modified="2006-11-09 11:01:53"
                approved="0"
                record_id="562">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-14.015650" avge_mass="-14.0266" composition="H(-2) C(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Glu-&gt;Lys" full_name="Glu-&gt;Lys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:02:15"
                date_time_modified="2006-11-09 11:02:15"
                approved="0"
                record_id="563">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-0.947630" avge_mass="-0.9417" composition="H(5) C N O(-2)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Glu-&gt;Gly" full_name="Glu-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:02:36"
                date_time_modified="2006-11-09 11:02:36"
                approved="0"
                record_id="564">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-72.021129" avge_mass="-72.0627" composition="H(-4) C(-3) O(-2)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Glu-&gt;Val" full_name="Glu-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:03:02"
                date_time_modified="2006-11-09 11:03:02"
                approved="0"
                record_id="565">
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-29.974179" avge_mass="-29.9829" composition="H(2) O(-2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Phe-&gt;Ser" full_name="Phe-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:03:29"
                date_time_modified="2006-11-09 11:03:29"
                approved="0"
                record_id="566">
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-60.036386" avge_mass="-60.0966" composition="H(-4) C(-6) O">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Phe-&gt;Cys" full_name="Phe-&gt;Cys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:04:01"
                date_time_modified="2006-11-09 11:04:01"
                approved="0"
                record_id="567">
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-44.059229" avge_mass="-44.0310" composition="H(-4) C(-6) S">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Phe-&gt;Ile" full_name="Phe-&gt;Ile or Phe-&gt;Leu substitution"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:05:41"
                date_time_modified="2006-11-09 11:05:41"
                approved="0"
                record_id="568">
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-33.984350" avge_mass="-34.0162" composition="H(2) C(-3)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Phe-&gt;Tyr" full_name="Phe-&gt;Tyr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:06:56"
                date_time_modified="2006-11-09 11:06:56"
                approved="0"
                record_id="569">
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="15.994915" avge_mass="15.9994" composition="O">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Phe-&gt;Val" full_name="Phe-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:07:20"
                date_time_modified="2006-11-09 11:07:20"
                approved="0"
                record_id="570">
         <umod:specificity hidden="1" site="F" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-48.000000" avge_mass="-48.0428" composition="C(-4)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="-4"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Ala" full_name="Gly-&gt;Ala substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:07:51"
                date_time_modified="2006-11-09 11:07:51"
                approved="0"
                record_id="571">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="14.015650" avge_mass="14.0266" composition="H(2) C">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Ser" full_name="Gly-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:08:13"
                date_time_modified="2006-11-09 11:08:13"
                approved="0"
                record_id="572">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="30.010565" avge_mass="30.0260" composition="H(2) C O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Trp" full_name="Gly-&gt;Trp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:08:33"
                date_time_modified="2006-11-09 11:08:33"
                approved="0"
                record_id="573">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="129.057849" avge_mass="129.1586" composition="H(7) C(9) N">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Glu" full_name="Gly-&gt;Glu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:08:57"
                date_time_modified="2006-11-09 11:08:57"
                approved="0"
                record_id="574">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="72.021129" avge_mass="72.0627" composition="H(4) C(3) O(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Val" full_name="Gly-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:09:18"
                date_time_modified="2006-11-09 11:09:18"
                approved="0"
                record_id="575">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="42.046950" avge_mass="42.0797" composition="H(6) C(3)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Asp" full_name="Gly-&gt;Asp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:09:44"
                date_time_modified="2006-11-09 11:09:44"
                approved="0"
                record_id="576">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="58.005479" avge_mass="58.0361" composition="H(2) C(2) O(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Cys" full_name="Gly-&gt;Cys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:10:03"
                date_time_modified="2006-11-09 11:10:03"
                approved="0"
                record_id="577">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="45.987721" avge_mass="46.0916" composition="H(2) C S">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gly-&gt;Arg" full_name="Gly-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:10:23"
                date_time_modified="2006-11-09 11:10:23"
                approved="0"
                record_id="578">
         <umod:specificity hidden="1" site="G" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="99.079647" avge_mass="99.1344" composition="H(9) C(4) N(3)">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="dNIC" full_name="deuterated Nicotinic Acid"
                username_of_poster="verena-meyer"
                group_of_poster=""
                date_time_posted="2006-12-04 16:12:54"
                date_time_modified="2006-12-09 17:32:46"
                approved="0"
                record_id="698">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="109.048119" avge_mass="109.1205" composition="H 2H(3) C(6) N O">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Nature Biotechnology  22, 450 - 454 (2004)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.nature.com/nbt/journal/v22/n4/abs/nbt947.html</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>15004565</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="His-&gt;Pro" full_name="His-&gt;Pro substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:11:29"
                date_time_modified="2006-11-09 11:11:29"
                approved="0"
                record_id="580">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-40.006148" avge_mass="-40.0241" composition="C(-1) N(-2)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="His-&gt;Tyr" full_name="His-&gt;Tyr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:11:50"
                date_time_modified="2006-11-09 11:11:50"
                approved="0"
                record_id="581">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="26.004417" avge_mass="26.0340" composition="H(2) C(3) N(-2) O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="His-&gt;Gln" full_name="His-&gt;Gln substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:14:42"
                date_time_modified="2006-11-09 11:14:42"
                approved="0"
                record_id="582">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-9.000334" avge_mass="-9.0101" composition="H C(-1) N(-1) O">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="NIC" full_name="Nicotinic Acid" username_of_poster="verena-meyer"
                group_of_poster=""
                date_time_posted="2006-12-04 16:04:56"
                date_time_modified="2006-12-09 17:31:30"
                approved="0"
                record_id="697">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="105.021464" avge_mass="105.0941" composition="H(3) C(6) N O">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Nature Biotechnology  22, 450 - 454 (2004)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.nature.com/nbt/journal/v22/n4/abs/nbt947.html</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>15004565</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="His-&gt;Arg" full_name="His-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:15:26"
                date_time_modified="2006-11-09 11:15:26"
                approved="0"
                record_id="584">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="19.042199" avge_mass="19.0464" composition="H(5) N">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="His-&gt;Leu" full_name="His-&gt;Leu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:15:51"
                date_time_modified="2006-11-09 11:15:51"
                approved="0"
                record_id="585">
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-23.974848" avge_mass="-23.9816" composition="H(4) N(-2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Phe" full_name="Ile-&gt;Phe substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:17:16"
                date_time_modified="2006-11-09 11:17:16"
                approved="0"
                record_id="586">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="33.984350" avge_mass="34.0162" composition="H(-2) C(3)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Ser" full_name="Ile-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:17:49"
                date_time_modified="2006-11-09 11:17:49"
                approved="0"
                record_id="587">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-26.052036" avge_mass="-26.0803" composition="H(-6) C(-3) O">
            <umod:element symbol="H" number="-6"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Thr" full_name="Ile-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:18:09"
                date_time_modified="2006-11-09 11:18:09"
                approved="0"
                record_id="588">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-12.036386" avge_mass="-12.0538" composition="H(-4) C(-2) O">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Asn" full_name="Ile-&gt;Asn substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:18:31"
                date_time_modified="2006-11-09 11:18:31"
                approved="0"
                record_id="589">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="0.958863" avge_mass="0.9450" composition="H(-5) C(-2) N O">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Lys" full_name="Ile-&gt;Lys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:18:57"
                date_time_modified="2006-11-09 11:18:57"
                approved="0"
                record_id="590">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="15.010899" avge_mass="15.0146" composition="H N">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Val" full_name="Ile-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:19:17"
                date_time_modified="2006-11-09 11:19:17"
                approved="0"
                record_id="591">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-14.015650" avge_mass="-14.0266" composition="H(-2) C(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Met" full_name="Ile-&gt;Met substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:19:40"
                date_time_modified="2006-11-09 11:19:40"
                approved="0"
                record_id="592">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="17.956421" avge_mass="18.0384" composition="H(-2) C(-1) S">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ile-&gt;Arg" full_name="Ile-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:20:00"
                date_time_modified="2006-11-09 11:20:00"
                approved="0"
                record_id="593">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="43.017047" avge_mass="43.0280" composition="H N(3)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Lys-&gt;Thr" full_name="Lys-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:20:28"
                date_time_modified="2006-11-09 11:20:28"
                approved="0"
                record_id="594">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-27.047285" avge_mass="-27.0684" composition="H(-5) C(-2) N(-1) O">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Lys-&gt;Asn" full_name="Lys-&gt;Asn substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:20:51"
                date_time_modified="2006-11-09 11:20:51"
                approved="0"
                record_id="595">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-14.052036" avge_mass="-14.0696" composition="H(-6) C(-2) O">
            <umod:element symbol="H" number="-6"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Lys-&gt;Glu" full_name="Lys-&gt;Glu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:21:12"
                date_time_modified="2006-11-09 11:21:12"
                approved="0"
                record_id="596">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="0.947630" avge_mass="0.9417" composition="H(-5) C(-1) N(-1) O(2)">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Lys-&gt;Gln" full_name="Lys-&gt;Gln substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:21:32"
                date_time_modified="2006-11-09 11:21:32"
                approved="0"
                record_id="597">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-0.036386" avge_mass="-0.0431" composition="H(-4) C(-1) O">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Lys-&gt;Met" full_name="Lys-&gt;Met substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:21:56"
                date_time_modified="2006-11-09 11:21:56"
                approved="0"
                record_id="598">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="2.945522" avge_mass="3.0238" composition="H(-3) C(-1) N(-1) S">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Lys-&gt;Arg" full_name="Lys-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:22:15"
                date_time_modified="2006-11-09 11:22:15"
                approved="0"
                record_id="599">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="28.006148" avge_mass="28.0134" composition="N(2)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Lys-&gt;Ile" full_name="Lys-&gt;Ile substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:22:38"
                date_time_modified="2006-11-09 11:22:38"
                approved="0"
                record_id="600">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-15.010899" avge_mass="-15.0146" composition="H(-1) N(-1)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Ser" full_name="Leu-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:23:01"
                date_time_modified="2006-11-09 11:23:01"
                approved="0"
                record_id="601">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-26.052036" avge_mass="-26.0803" composition="H(-6) C(-3) O">
            <umod:element symbol="H" number="-6"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Phe" full_name="Leu-&gt;Phe substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:23:22"
                date_time_modified="2006-11-09 11:23:22"
                approved="0"
                record_id="602">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="33.984350" avge_mass="34.0162" composition="H(-2) C(3)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Trp" full_name="Leu-&gt;Trp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:23:48"
                date_time_modified="2006-11-09 11:23:48"
                approved="0"
                record_id="603">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="72.995249" avge_mass="73.0523" composition="H(-1) C(5) N">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Pro" full_name="Leu-&gt;Pro substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:24:06"
                date_time_modified="2006-11-09 11:24:06"
                approved="0"
                record_id="604">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-16.031300" avge_mass="-16.0425" composition="H(-4) C(-1)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Val" full_name="Leu-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:24:28"
                date_time_modified="2006-11-09 11:24:28"
                approved="0"
                record_id="605">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-14.015650" avge_mass="-14.0266" composition="H(-2) C(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;His" full_name="Leu-&gt;His substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:24:50"
                date_time_modified="2006-11-09 11:24:50"
                approved="0"
                record_id="606">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="23.974848" avge_mass="23.9816" composition="H(-4) N(2)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Gln" full_name="Leu-&gt;Gln substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:25:14"
                date_time_modified="2006-11-09 11:25:14"
                approved="0"
                record_id="607">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="14.974514" avge_mass="14.9716" composition="H(-3) C(-1) N O">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Met" full_name="Leu-&gt;Met substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:25:59"
                date_time_modified="2006-11-09 11:25:59"
                approved="0"
                record_id="608">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="17.956421" avge_mass="18.0384" composition="H(-2) C(-1) S">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Leu-&gt;Arg" full_name="Leu-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:26:21"
                date_time_modified="2006-11-09 11:26:21"
                approved="0"
                record_id="609">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="43.017047" avge_mass="43.0280" composition="H N(3)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Met-&gt;Thr" full_name="Met-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:26:47"
                date_time_modified="2006-11-09 11:26:47"
                approved="0"
                record_id="610">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-29.992806" avge_mass="-30.0922" composition="H(-2) C(-1) O S(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Met-&gt;Arg" full_name="Met-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:27:10"
                date_time_modified="2006-11-09 11:27:10"
                approved="0"
                record_id="611">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="25.060626" avge_mass="24.9896" composition="H(3) C N(3) S(-1)">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Met-&gt;Ile" full_name="Met-&gt;Ile substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:27:27"
                date_time_modified="2006-11-09 11:27:48"
                approved="0"
                record_id="612">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-17.956421" avge_mass="-18.0384" composition="H(2) C S(-1)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Met-&gt;Lys" full_name="Met-&gt;Lys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:28:29"
                date_time_modified="2006-11-09 11:28:29"
                approved="0"
                record_id="613">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-2.945522" avge_mass="-3.0238" composition="H(3) C N S(-1)">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Met-&gt;Leu" full_name="Met-&gt;Leu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:28:56"
                date_time_modified="2006-11-09 11:28:56"
                approved="0"
                record_id="614">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-17.956421" avge_mass="-18.0384" composition="H(2) C S(-1)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Met-&gt;Val" full_name="Met-&gt;Val substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:29:27"
                date_time_modified="2006-11-09 11:29:27"
                approved="0"
                record_id="615">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-31.972071" avge_mass="-32.0650" composition="S(-1)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asn-&gt;Ser" full_name="Asn-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:29:57"
                date_time_modified="2006-11-09 11:29:57"
                approved="0"
                record_id="616">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-27.010899" avge_mass="-27.0253" composition="H(-1) C(-1) N(-1)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asn-&gt;Thr" full_name="Asn-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:34:11"
                date_time_modified="2006-11-09 11:34:11"
                approved="0"
                record_id="617">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-12.995249" avge_mass="-12.9988" composition="H N(-1)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asn-&gt;Lys" full_name="Asn-&gt;Lys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:34:31"
                date_time_modified="2006-11-09 11:34:31"
                approved="0"
                record_id="618">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="14.052036" avge_mass="14.0696" composition="H(6) C(2) O(-1)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asn-&gt;Tyr" full_name="Asn-&gt;Tyr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:34:56"
                date_time_modified="2006-11-09 11:34:56"
                approved="0"
                record_id="619">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="49.020401" avge_mass="49.0706" composition="H(3) C(5) N(-1)">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asn-&gt;His" full_name="Asn-&gt;His substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:35:18"
                date_time_modified="2006-11-09 11:35:18"
                approved="0"
                record_id="620">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="23.015984" avge_mass="23.0366" composition="H C(2) N O(-1)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asn-&gt;Asp" full_name="Asn-&gt;Asp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:35:42"
                date_time_modified="2006-11-09 11:35:42"
                approved="0"
                record_id="621">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="0.984016" avge_mass="0.9848" composition="H(-1) N(-1) O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Asn-&gt;Ile" full_name="Asn-&gt;Ile substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:36:02"
                date_time_modified="2006-11-09 11:36:02"
                approved="0"
                record_id="622">
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-0.958863" avge_mass="-0.9450" composition="H(5) C(2) N(-1) O(-1)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pro-&gt;Ser" full_name="Pro-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:36:26"
                date_time_modified="2006-11-09 11:36:26"
                approved="0"
                record_id="623">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-10.020735" avge_mass="-10.0379" composition="H(-2) C(-2) O">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pro-&gt;Ala" full_name="Pro-&gt;Ala substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:37:56"
                date_time_modified="2006-11-09 11:37:56"
                approved="0"
                record_id="624">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-26.015650" avge_mass="-26.0373" composition="H(-2) C(-2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pro-&gt;His" full_name="Pro-&gt;His substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:38:18"
                date_time_modified="2006-11-09 11:38:18"
                approved="0"
                record_id="625">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="40.006148" avge_mass="40.0241" composition="C N(2)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pro-&gt;Gln" full_name="Pro-&gt;Gln substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:38:40"
                date_time_modified="2006-11-09 11:38:40"
                approved="0"
                record_id="626">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="31.005814" avge_mass="31.0140" composition="H N O">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pro-&gt;Thr" full_name="Pro-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:39:02"
                date_time_modified="2006-11-09 11:39:02"
                approved="0"
                record_id="627">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="3.994915" avge_mass="3.9887" composition="C(-1) O">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pro-&gt;Arg" full_name="Pro-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:39:29"
                date_time_modified="2006-11-09 11:39:29"
                approved="0"
                record_id="628">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="59.048347" avge_mass="59.0705" composition="H(5) C N(3)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Pro-&gt;Leu" full_name="Pro-&gt;Leu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:39:47"
                date_time_modified="2006-11-09 11:39:47"
                approved="0"
                record_id="629">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="16.031300" avge_mass="16.0425" composition="H(4) C">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gln-&gt;Pro" full_name="Gln-&gt;Pro substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:40:19"
                date_time_modified="2006-11-09 11:40:19"
                approved="0"
                record_id="630">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-31.005814" avge_mass="-31.0140" composition="H(-1) N(-1) O(-1)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gln-&gt;Lys" full_name="Gln-&gt;Lys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:42:17"
                date_time_modified="2006-11-09 11:42:17"
                approved="0"
                record_id="631">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="0.036386" avge_mass="0.0431" composition="H(4) C O(-1)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gln-&gt;Glu" full_name="Gln-&gt;Glu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:42:38"
                date_time_modified="2006-11-09 11:42:38"
                approved="0"
                record_id="632">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="0.984016" avge_mass="0.9848" composition="H(-1) N(-1) O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gln-&gt;His" full_name="Gln-&gt;His substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:42:58"
                date_time_modified="2006-11-09 11:42:58"
                approved="0"
                record_id="633">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="9.000334" avge_mass="9.0101" composition="H(-1) C N O(-1)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gln-&gt;Arg" full_name="Gln-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:43:25"
                date_time_modified="2006-11-09 11:43:25"
                approved="0"
                record_id="634">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="28.042534" avge_mass="28.0565" composition="H(4) C N(2) O(-1)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Gln-&gt;Leu" full_name="Gln-&gt;Leu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:43:47"
                date_time_modified="2006-11-09 11:43:47"
                approved="0"
                record_id="635">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-14.974514" avge_mass="-14.9716" composition="H(3) C N(-1) O(-1)">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Ser" full_name="Arg-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:44:13"
                date_time_modified="2006-11-09 11:44:13"
                approved="0"
                record_id="636">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-69.069083" avge_mass="-69.1084" composition="H(-7) C(-3) N(-3) O">
            <umod:element symbol="H" number="-7"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Trp" full_name="Arg-&gt;Trp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:44:36"
                date_time_modified="2006-11-09 11:44:36"
                approved="0"
                record_id="637">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="29.978202" avge_mass="30.0242" composition="H(-2) C(5) N(-2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Thr" full_name="Arg-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:44:59"
                date_time_modified="2006-11-09 11:44:59"
                approved="0"
                record_id="638">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-55.053433" avge_mass="-55.0818" composition="H(-5) C(-2) N(-3) O">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Pro" full_name="Arg-&gt;Pro substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:45:18"
                date_time_modified="2006-11-09 11:45:18"
                approved="0"
                record_id="639">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-59.048347" avge_mass="-59.0705" composition="H(-5) C(-1) N(-3)">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Lys" full_name="Arg-&gt;Lys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:45:37"
                date_time_modified="2006-11-09 11:45:37"
                approved="0"
                record_id="640">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-28.006148" avge_mass="-28.0134" composition="N(-2)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;His" full_name="Arg-&gt;His substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:45:56"
                date_time_modified="2006-11-09 11:45:56"
                approved="0"
                record_id="641">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-19.042199" avge_mass="-19.0464" composition="H(-5) N(-1)">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Gln" full_name="Arg-&gt;Gln substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:46:17"
                date_time_modified="2006-11-09 11:46:17"
                approved="0"
                record_id="642">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-28.042534" avge_mass="-28.0565" composition="H(-4) C(-1) N(-2) O">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Met" full_name="Arg-&gt;Met substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:46:37"
                date_time_modified="2006-11-09 11:46:37"
                approved="0"
                record_id="643">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-25.060626" avge_mass="-24.9896" composition="H(-3) C(-1) N(-3) S">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Cys" full_name="Arg-&gt;Cys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:47:00"
                date_time_modified="2006-11-09 11:47:00"
                approved="0"
                record_id="644">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-53.091927" avge_mass="-53.0428" composition="H(-7) C(-3) N(-3) S">
            <umod:element symbol="H" number="-7"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Ile" full_name="Arg-&gt;Ile or Arg-&gt;Leu substitution"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:47:36"
                date_time_modified="2006-11-09 11:47:36"
                approved="0"
                record_id="645">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-43.017047" avge_mass="-43.0280" composition="H(-1) N(-3)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Arg-&gt;Gly" full_name="Arg-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 11:48:00"
                date_time_modified="2006-11-09 11:48:00"
                approved="0"
                record_id="646">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-99.079647" avge_mass="-99.1344" composition="H(-9) C(-4) N(-3)">
            <umod:element symbol="H" number="-9"/>
            <umod:element symbol="C" number="-4"/>
            <umod:element symbol="N" number="-3"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Phe" full_name="Ser-&gt;Phe substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:32:55"
                date_time_modified="2006-11-09 12:32:55"
                approved="0"
                record_id="647">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="60.036386" avge_mass="60.0966" composition="H(4) C(6) O(-1)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Ala" full_name="Ser-&gt;Ala substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:33:14"
                date_time_modified="2006-11-09 12:33:14"
                approved="0"
                record_id="648">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-15.994915" avge_mass="-15.9994" composition="O(-1)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Trp" full_name="Ser-&gt;Trp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:33:32"
                date_time_modified="2006-11-09 12:33:32"
                approved="0"
                record_id="649">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="99.047285" avge_mass="99.1326" composition="H(5) C(8) N O(-1)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Thr" full_name="Ser-&gt;Thr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:33:51"
                date_time_modified="2006-11-09 12:33:51"
                approved="0"
                record_id="650">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="14.015650" avge_mass="14.0266" composition="H(2) C">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Asn" full_name="Ser-&gt;Asn substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:34:12"
                date_time_modified="2006-11-09 12:34:12"
                approved="0"
                record_id="651">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="27.010899" avge_mass="27.0253" composition="H C N">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Pro" full_name="Ser-&gt;Pro substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:34:34"
                date_time_modified="2006-11-09 12:34:34"
                approved="0"
                record_id="652">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="10.020735" avge_mass="10.0379" composition="H(2) C(2) O(-1)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Tyr" full_name="Ser-&gt;Tyr substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:35:00"
                date_time_modified="2006-11-09 12:35:00"
                approved="0"
                record_id="653">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="76.031300" avge_mass="76.0960" composition="H(4) C(6)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Cys" full_name="Ser-&gt;Cys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:35:22"
                date_time_modified="2006-11-09 12:35:22"
                approved="0"
                record_id="654">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="15.977156" avge_mass="16.0656" composition="O(-1) S">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Arg" full_name="Ser-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:35:40"
                date_time_modified="2006-11-09 12:35:40"
                approved="0"
                record_id="655">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="69.069083" avge_mass="69.1084" composition="H(7) C(3) N(3) O(-1)">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Ile" full_name="Ser-&gt;Ile or Ser-&gt;Leu substitution"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:36:10"
                date_time_modified="2006-11-09 12:36:10"
                approved="0"
                record_id="656">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="26.052036" avge_mass="26.0803" composition="H(6) C(3) O(-1)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Ser-&gt;Gly" full_name="Ser-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:36:34"
                date_time_modified="2006-11-09 12:36:34"
                approved="0"
                record_id="657">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-30.010565" avge_mass="-30.0260" composition="H(-2) C(-1) O(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Ser" full_name="Thr-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:36:57"
                date_time_modified="2006-11-09 12:36:57"
                approved="0"
                record_id="658">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-14.015650" avge_mass="-14.0266" composition="H(-2) C(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Ala" full_name="Thr-&gt;Ala substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:37:15"
                date_time_modified="2006-11-09 12:37:15"
                approved="0"
                record_id="659">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-30.010565" avge_mass="-30.0260" composition="H(-2) C(-1) O(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Asn" full_name="Thr-&gt;Asn substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:37:37"
                date_time_modified="2006-11-09 12:37:37"
                approved="0"
                record_id="660">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="12.995249" avge_mass="12.9988" composition="H(-1) N">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Lys" full_name="Thr-&gt;Lys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:37:55"
                date_time_modified="2006-11-09 12:37:55"
                approved="0"
                record_id="661">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="27.047285" avge_mass="27.0684" composition="H(5) C(2) N O(-1)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Pro" full_name="Thr-&gt;Pro substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:38:14"
                date_time_modified="2006-11-09 12:38:14"
                approved="0"
                record_id="662">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-3.994915" avge_mass="-3.9887" composition="C O(-1)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Met" full_name="Thr-&gt;Met substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:38:34"
                date_time_modified="2006-11-09 12:38:34"
                approved="0"
                record_id="663">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="29.992806" avge_mass="30.0922" composition="H(2) C O(-1) S">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Ile" full_name="Thr-&gt;Ile substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:38:56"
                date_time_modified="2006-11-09 12:38:56"
                approved="0"
                record_id="664">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="12.036386" avge_mass="12.0538" composition="H(4) C(2) O(-1)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Thr-&gt;Arg" full_name="Thr-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:39:14"
                date_time_modified="2006-11-09 12:39:14"
                approved="0"
                record_id="665">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="55.053433" avge_mass="55.0818" composition="H(5) C(2) N(3) O(-1)">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Val-&gt;Phe" full_name="Val-&gt;Phe substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:39:35"
                date_time_modified="2006-11-09 12:39:35"
                approved="0"
                record_id="666">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="48.000000" avge_mass="48.0428" composition="C(4)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Val-&gt;Ala" full_name="Val-&gt;Ala substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:40:00"
                date_time_modified="2006-11-09 12:40:00"
                approved="0"
                record_id="667">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-28.031300" avge_mass="-28.0532" composition="H(-4) C(-2)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Val-&gt;Glu" full_name="Val-&gt;Glu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:40:19"
                date_time_modified="2006-11-09 12:40:19"
                approved="0"
                record_id="668">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="29.974179" avge_mass="29.9829" composition="H(-2) O(2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Val-&gt;Met" full_name="Val-&gt;Met substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:40:36"
                date_time_modified="2006-11-09 12:40:36"
                approved="0"
                record_id="669">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="31.972071" avge_mass="32.0650" composition="S">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Val-&gt;Asp" full_name="Val-&gt;Asp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:41:04"
                date_time_modified="2006-11-09 12:41:04"
                approved="0"
                record_id="670">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="15.958529" avge_mass="15.9563" composition="H(-4) C(-1) O(2)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Val-&gt;Ile" full_name="Val-&gt;Ile or Val-&gt;Leu substitution"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:41:27"
                date_time_modified="2006-11-24 15:29:33"
                approved="0"
                record_id="671">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="14.015650" avge_mass="14.0266" composition="H(2) C">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Val-&gt;Gly" full_name="Val-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:41:45"
                date_time_modified="2006-11-09 12:41:45"
                approved="0"
                record_id="672">
         <umod:specificity hidden="1" site="V" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-42.046950" avge_mass="-42.0797" composition="H(-6) C(-3)">
            <umod:element symbol="H" number="-6"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Trp-&gt;Ser" full_name="Trp-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:42:22"
                date_time_modified="2006-11-09 12:42:22"
                approved="0"
                record_id="673">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-99.047285" avge_mass="-99.1326" composition="H(-5) C(-8) N(-1) O">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-8"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Trp-&gt;Cys" full_name="Trp-&gt;Cys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:42:46"
                date_time_modified="2006-11-09 12:42:46"
                approved="0"
                record_id="674">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-83.070128" avge_mass="-83.0670" composition="H(-5) C(-8) N(-1) S">
            <umod:element symbol="H" number="-5"/>
            <umod:element symbol="C" number="-8"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Trp-&gt;Arg" full_name="Trp-&gt;Arg substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:43:10"
                date_time_modified="2006-11-09 12:43:10"
                approved="0"
                record_id="675">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-29.978202" avge_mass="-30.0242" composition="H(2) C(-5) N(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="-5"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Trp-&gt;Gly" full_name="Trp-&gt;Gly substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:43:29"
                date_time_modified="2006-11-09 12:43:29"
                approved="0"
                record_id="676">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-129.057849" avge_mass="-129.1586" composition="H(-7) C(-9) N(-1)">
            <umod:element symbol="H" number="-7"/>
            <umod:element symbol="C" number="-9"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Trp-&gt;Leu" full_name="Trp-&gt;Leu substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:43:49"
                date_time_modified="2006-11-09 12:43:49"
                approved="0"
                record_id="677">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-72.995249" avge_mass="-73.0523" composition="H C(-5) N(-1)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="-5"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Tyr-&gt;Phe" full_name="Tyr-&gt;Phe substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:44:13"
                date_time_modified="2006-11-09 12:44:13"
                approved="0"
                record_id="678">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-15.994915" avge_mass="-15.9994" composition="O(-1)">
            <umod:element symbol="H" number="0"/>
            <umod:element symbol="C" number="0"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Tyr-&gt;Ser" full_name="Tyr-&gt;Ser substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:44:37"
                date_time_modified="2006-11-09 12:44:37"
                approved="0"
                record_id="679">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-76.031300" avge_mass="-76.0960" composition="H(-4) C(-6)">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Tyr-&gt;Asn" full_name="Tyr-&gt;Asn substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:44:59"
                date_time_modified="2006-11-09 12:44:59"
                approved="0"
                record_id="680">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-49.020401" avge_mass="-49.0706" composition="H(-3) C(-5) N">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="C" number="-5"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="0"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Tyr-&gt;His" full_name="Tyr-&gt;His substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:45:22"
                date_time_modified="2006-11-09 12:45:22"
                approved="0"
                record_id="681">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-26.004417" avge_mass="-26.0340"
                     composition="H(-2) C(-3) N(2) O(-1)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Tyr-&gt;Asp" full_name="Tyr-&gt;Asp substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:45:44"
                date_time_modified="2006-11-09 12:45:44"
                approved="0"
                record_id="682">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-48.036386" avge_mass="-48.0859" composition="H(-4) C(-5) O">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-5"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="0"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Tyr-&gt;Cys" full_name="Tyr-&gt;Cys substitution" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-09 12:46:03"
                date_time_modified="2006-11-09 12:46:03"
                approved="0"
                record_id="683">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="AA substitution"
                           spec_group="1"/>
         <umod:delta mono_mass="-60.054144" avge_mass="-60.0304" composition="H(-4) C(-6) O(-1) S">
            <umod:element symbol="H" number="-4"/>
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="N" number="0"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="BDMAPP" full_name="Mass Defect Tag on lysine e-amino"
                username_of_poster="LVSchneid"
                group_of_poster=""
                date_time_posted="2006-11-13 18:51:11"
                date_time_modified="2006-11-13 18:52:47"
                approved="0"
                record_id="684">
         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Artefact"
                           spec_group="5">
            <umod:misc_notes>Low efficiency</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Artefact"
                           spec_group="4">
            <umod:misc_notes>Low efficiency</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                           classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
                           spec_group="1">
            <umod:misc_notes>Low efficiency</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="253.010225" avge_mass="254.1231" composition="H(12) C(11) N O Br">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="11"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="Br" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Isotope-differentiated binding energy shift tags</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.targetdiscovery.com/article.php?topic=crpc.prst&amp;story=20060321132643690</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NA-LNO2" full_name="Nitroalkylation by Nitro Linoleic Acid"
                username_of_poster="cbatthya"
                group_of_poster=""
                date_time_posted="2006-11-13 18:59:35"
                date_time_modified="2006-11-13 18:59:35"
                approved="0"
                record_id="685">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:delta mono_mass="325.225309" avge_mass="325.4430" composition="H(31) C(18) N O(4)">
            <umod:element symbol="H" number="31"/>
            <umod:element symbol="C" number="18"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:alt_name>Michael addition of nitro-linoleic acid to Cys and His</umod:alt_name>
         <umod:xref>
            <umod:text>JBC 281(29):20450-63; 2006</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Reversible post-translational modification of proteins by nitrated fatty acids</umod:misc_notes>
      </umod:mod>
      <umod:mod title="NA-OA-NO2" full_name="Nitroalkylation by Nitro Oleic Acid"
                username_of_poster="cbatthya"
                group_of_poster=""
                date_time_posted="2006-11-13 19:01:33"
                date_time_modified="2006-11-13 19:01:33"
                approved="0"
                record_id="686">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                           spec_group="2"/>
         <umod:delta mono_mass="327.240959" avge_mass="327.4589" composition="H(33) C(18) N O(4)">
            <umod:element symbol="H" number="33"/>
            <umod:element symbol="C" number="18"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:alt_name>Michael addition of nitro-oleic acid to Cys and His</umod:alt_name>
         <umod:xref>
            <umod:text>JBC 281(29):20450-63; 2006</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Reversible post-translational modification of proteins by nitrated fatty acids</umod:misc_notes>
      </umod:mod>
      <umod:mod title="ICPL:2H(4)"
                full_name="Bruker Daltonics SERVA-ICPL(TM) quantification chemistry, medium form"
                username_of_poster="suckau"
                group_of_poster=""
                date_time_posted="2006-11-13 19:05:12"
                date_time_modified="2008-09-03 15:26:54"
                approved="0"
                record_id="687">
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Use when labelling post-digest</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="N-term" position="Protein N-term"
                           classification="Isotopic label"
                           spec_group="2">
            <umod:misc_notes>Use when labelling pre-digest</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="109.046571" avge_mass="109.1188" composition="H(-1) 2H(4) C(6) N O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Bruker Daltonics order reference</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.bdal.de/life-science-tools/care-consumables-more/icpl-kit.html</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Schmidt A, Kellermann J, Lottspeich F (2005): A novel strategy for quantitative proteomics using isotope-coded protein labels. Proteomics 5: 4-15</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15602776</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Attention: As the digest is typically applied AFTER ICPL_light/heavy labeling, only ProteinN-term labeling and Lys-specific labeling is applied.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="iTRAQ8plex"
                full_name="Representative mass and accurate mass for 113, 114, 116 &amp; 117"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2007-01-11 09:53:13"
                date_time_modified="2007-01-13 21:00:08"
                approved="0"
                record_id="730">
         <umod:specificity hidden="0" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="304.205360" avge_mass="304.3074"
                     composition="H(24) C(7) 13C(7) N(3) 15N O(3)">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="13C" number="7"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="15N" number="1"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:alt_name>AKA iTRAQ8plex:13C(7)15N(1)</umod:alt_name>
         <umod:alt_name>Applied Biosystems iTRAQ(TM) multiplexed quantitation chemistry</umod:alt_name>
         <umod:misc_notes>Other 4 channels have the same nominal mass but slightly different exact mass. For quantitation purposes, use this entry for all channels</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Label:13C(6)15N(1)" full_name="13C(6) 15N(1) Silac label"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2006-11-29 15:10:53"
                date_time_modified="2007-08-22 18:30:49"
                approved="1"
                record_id="695">
         <umod:specificity hidden="1" site="I" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="7.017164" avge_mass="6.9493" composition="C(-6) 13C(6) N(-1) 15N">
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="15N" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:2H(9)13C(6)15N(2)" full_name="13C(6) 15N(2) (D)9 SILAC label"
                username_of_poster="striker2000"
                group_of_poster=""
                date_time_posted="2006-12-01 22:36:25"
                date_time_modified="2007-08-22 18:48:35"
                approved="0"
                record_id="696">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="17.070690" avge_mass="16.9982"
                     composition="H(-9) 2H(9) C(-6) 13C(6) N(-2) 15N(2)">
            <umod:element symbol="H" number="-9"/>
            <umod:element symbol="2H" number="9"/>
            <umod:element symbol="C" number="-6"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="15N" number="2"/>
         </umod:delta>
         <umod:alt_name>heavy D9 lysine</umod:alt_name>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>CDNLM-6810</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.isotope.com/cil/products/displayproduct.cfm?prod_id=8635</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="HNE-Delta:H(2)O" full_name="Dehydrated 4-hydroxynonenal"
                username_of_poster="stewartb"
                group_of_poster=""
                date_time_posted="2007-01-08 18:29:46"
                date_time_modified="2007-01-21 18:27:18"
                approved="0"
                record_id="720">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="138.104465" avge_mass="138.2069" composition="H(14) C(9) O">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Liu Z, Minkler P, and Sayre L.  Chem. Res. Toxicology 2003 16 901-911</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Mass Spectroscopic Characterization of Protein Modification by 4-Hydroxy-2-(E)-nonenal and 4-Oxo-2-(E)-nonenal.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="4-ONE" full_name="4-Oxononenal (ONE)" username_of_poster="stewartb"
                group_of_poster=""
                date_time_posted="2007-01-08 19:41:28"
                date_time_modified="2007-01-21 18:26:54"
                approved="0"
                record_id="721">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="154.099380" avge_mass="154.2063" composition="H(14) C(9) O(2)">
            <umod:element symbol="H" number="14"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Chemico-Biological Interactions 143-144(2003) 93-100.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Covalent adduction of nucleophilic amino acids by 4-hydroxynonenal and 4-oxononenal</umod:misc_notes>
      </umod:mod>
      <umod:mod title="O-Dimethylphosphate" full_name="O-Dimethylphosphorylation"
                username_of_poster="lmschopfer"
                group_of_poster=""
                date_time_posted="2007-01-09 21:25:28"
                date_time_modified="2007-01-13 21:01:15"
                approved="0"
                record_id="723">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="107.997631" avge_mass="108.0331" composition="H(5) C(2) O(3) P">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Fidder, Hulst, Noort, Ruiter, van der Schans, Benschop and Langenberg; Retrospective detection of exposure to organophosphorus anti-cholinesterases:  Mass spectrometric analysis of phosphylated human butyrylcholinestease.  Chem. Res. Toxicol. 15, 582-590 (2002)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="O-Methylphosphate" full_name="O-Methylphosphorylation"
                username_of_poster="lmschopfer"
                group_of_poster=""
                date_time_posted="2007-01-09 21:35:38"
                date_time_modified="2007-01-21 18:13:01"
                approved="0"
                record_id="724">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="93.981981" avge_mass="94.0065" composition="H(3) C O(3) P">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Main;  Mode of action of anticholnesterases.  Pharmac Ther 6, 579-628 (1979)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Created by auto-catalytic dealkylation of the O-Dimethylphosphate adduct.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="O-Diethylphosphate" full_name="O-Diethylphosphorylation"
                username_of_poster="lmschopfer"
                group_of_poster=""
                date_time_posted="2007-01-09 21:44:04"
                date_time_modified="2007-01-13 21:03:17"
                approved="0"
                record_id="725">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="136.028931" avge_mass="136.0862" composition="H(9) C(4) O(3) P">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Fidder, Hulst, Noort, Ruiter, van der Schans, Benschop and Langenberg; Retrospective detection of exposure to organophosphorus anti-cholinesterases:  Mass spectrometric analysis of phosphylated human butyrylcholinestease.  Chem. Res. Toxicol. 15, 582-590 (2002)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="O-Ethylphosphate" full_name="O-Ethylphosphorylation"
                username_of_poster="lmschopfer"
                group_of_poster=""
                date_time_posted="2007-01-09 21:46:17"
                date_time_modified="2007-01-21 18:12:23"
                approved="0"
                record_id="726">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="107.997631" avge_mass="108.0331" composition="H(5) C(2) O(3) P">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Main;  Mode of action of anticholnesterases.  Pharmac Ther 6, 579-628 (1979)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Created by auto-catalytic dealkylation of the O-Diethylphosphate adduct.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="O-pinacolylmethylphosphonate"
                full_name="O-pinacolylmethylphosphonylation"
                username_of_poster="lmschopfer"
                group_of_poster=""
                date_time_posted="2007-01-10 16:04:46"
                date_time_modified="2007-01-13 21:06:41"
                approved="0"
                record_id="727">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="162.080967" avge_mass="162.1666" composition="H(15) C(7) O(2) P">
            <umod:element symbol="H" number="15"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Fidder, Hulst, Noort, Ruiter, van der Schans, Benschop and Langenberg; Retrospective detection of exposure to organophosphorus anti-cholinesterases:  Mass spectrometric analysis of phosphylated human butyrylcholinestease.  Chem. Res. Toxicol. 15, 582-590 (2002)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Methylphosphonate" full_name="Methylphosphonylation"
                username_of_poster="lmschopfer"
                group_of_poster=""
                date_time_posted="2007-01-10 16:07:37"
                date_time_modified="2007-01-21 18:11:36"
                approved="0"
                record_id="728">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="77.987066" avge_mass="78.0071" composition="H(3) C O(2) P">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="1"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Main;  Mode of action of anticholnesterases.  Pharmac Ther 6, 579-628 (1979)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Created by auto-catalytic dealkylation of either the O-pinacolylmethylphosphonate adduct, or the O-isopropylmethylphosphonate adduct.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="O-Isopropylmethylphosphonate"
                full_name="O-Isopropylmethylphosphonylation"
                username_of_poster="lmschopfer"
                group_of_poster=""
                date_time_posted="2007-01-10 16:10:55"
                date_time_modified="2007-01-13 21:02:02"
                approved="0"
                record_id="729">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="120.034017" avge_mass="120.0868" composition="H(9) C(4) O(2) P">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Fidder, Hulst, Noort, Ruiter, van der Schans, Benschop and Langenberg; Retrospective detection of exposure to organophosphorus anti-cholinesterases:  Mass spectrometric analysis of phosphylated human butyrylcholinestease.  Chem. Res. Toxicol. 15, 582-590 (2002)</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="iTRAQ8plex:13C(6)15N(2)"
                full_name="Accurate mass for 115, 118, 119 &amp; 121"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2007-01-11 09:56:21"
                date_time_modified="2007-01-13 20:59:54"
                approved="0"
                record_id="731">
         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Low abundance</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="304.199040" avge_mass="304.3081"
                     composition="H(24) C(8) 13C(6) N(2) 15N(2) O(3)">
            <umod:element symbol="H" number="24"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="15N" number="2"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
         <umod:alt_name>Applied Biosystems iTRAQ(TM) multiplexed quantitation chemistry</umod:alt_name>
         <umod:misc_notes>Other 4 channels have the same nominal mass but slightly different exact mass. For quantitation purposes, use iTRAQ8plex for all channels</umod:misc_notes>
      </umod:mod>
      <umod:mod title="DTT_ST" full_name="Dithiothreitol (DTT)"
                username_of_poster="stephenaw777"
                group_of_poster=""
                date_time_posted="2007-02-10 00:00:43"
                date_time_modified="2007-02-11 19:39:11"
                approved="0"
                record_id="735">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>The addition of DTT adds 136.2 not 154.2 to Serine due to loss of water in reaction</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Chemical derivative"
                           spec_group="2">
            <umod:misc_notes>The addition of DTT adds 136.2 not 154.2 to Threonine due to loss of water in reaction</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="136.001656" avge_mass="136.2357" composition="H(8) C(4) O S(2)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:alt_name>threo-1,4-dimercaptobutane-2,3-diol</umod:alt_name>
         <umod:alt_name>Cleland's reagent</umod:alt_name>
         <umod:xref>
            <umod:text>Methods Enzymol. 2006;415:113-33.  Links rnIdentification of O-GlcNAc sites on proteins.Whelan SA, Hart GW.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>17116471</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Mol Cell Proteomics. 2002 Oct;1(10):791-804.  rnMapping sites of O-GlcNAc modification using affinity tags for serine and threonine post-translational modifications.Wells L, Vosseller K, Cole RN, Cronshaw JM, Matunis MJ, Hart GW.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>12438562</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Proteomics. 2005 Feb;5(2):388-98.  Links rnQuantitative analysis of both protein expression and serine / threonine post-translational modifications through stable isotope labeling with dithiothreitol.Vosseller K, Hansen KC, Chalkley RJ, Trinidad JC, Wells L, Hart GW, Burlingame AL.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>15648052</umod:url>
         </umod:xref>
         <umod:misc_notes>Beta-elimination and Michael addition of dithiothreitol (DTT) to serine and threonine adds a weight of approximately 136.2.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Ethanolamine" full_name="Carboxyl modification with ethanolamine"
                username_of_poster="overalllab"
                group_of_poster=""
                date_time_posted="2007-01-31 22:04:44"
                date_time_modified="2007-02-11 19:39:59"
                approved="0"
                record_id="734">
         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C-term" position="Any C-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:delta mono_mass="43.042199" avge_mass="43.0678" composition="H(5) C(2) N">
            <umod:element symbol="H" number="5"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
         <umod:misc_notes>Carbodiimide mediated blocking of free carboxylic acids (Asp/Glu sidechains and C-termini) with ethanolamine; reaction yields an amide-bond between the carboxylic acid of the peptide/protein and the primary amine of ethanolamine; reaction irreversibly modifies carboxylic acids. Shown above is the composition of the mass adduct, after substraction of water.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="TMT6plex" full_name="Sixplex Tandem Mass Tag®"
                username_of_poster="JUergen.schaefer"
                group_of_poster=""
                date_time_posted="2007-03-01 13:44:23"
                date_time_modified="2007-03-03 18:24:35"
                approved="0"
                record_id="737">
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:delta mono_mass="229.162932" avge_mass="229.2634"
                     composition="H(20) C(8) 13C(4) N 15N O(2)">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="8"/>
            <umod:element symbol="13C" number="4"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="15N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>Tandem Mass Tag sixplex labelling kit Proteome Sciences</umod:alt_name>
         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
         <umod:xref>
            <umod:text>Juergen.Schaefer@Proteomics.com</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Sixplex-TMT® reagents 6TMT-126, 6TMT-127, 6TMT-128, 6TMT-129, 6TMT-130, 6TMT-131 Masses of the TMT® fragment ions to be quantified:126.1283 127.1316 128.1350 129.1383 130.1417 131.1387</umod:misc_notes>
      </umod:mod>
      <umod:mod title="DTT_C" full_name="Dithiothreitol (DTT) on Cys"
                username_of_poster="stephenaw777"
                group_of_poster=""
                date_time_posted="2007-02-10 03:12:41"
                date_time_modified="2007-02-11 19:38:59"
                approved="0"
                record_id="736">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="120.024500" avge_mass="120.1701" composition="H(8) C(4) O(2) S">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>Cleland's reagent</umod:alt_name>
         <umod:xref>
            <umod:text>Methods Enzymol. 2006;415:113-33.  Links rnIdentification of O-GlcNAc sites on proteins.Whelan SA, Hart GW.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>17116471</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Mol Cell Proteomics. 2006 May;5(5):923-34. Epub 2006 Feb 1.  Links rnO-linked N-acetylglucosamine proteomics of postsynaptic density preparations using lectin weak affinity chromatography and mass spectrometry.Vosseller K, Trinidad JC, Chalkley RJ, Specht CG, Thalhammer A, Lynn AJ, Snedecor JO, Guan S, Medzihradszky KF, Maltby DA, Schoepfer R, Burlingame AL.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>16452088</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Mol Cell Proteomics. 2002 Oct;1(10):791-804.  Mapping sites of O-GlcNAc modification using affinity tags for serine and threonine post-translational modifications.Wells L, Vosseller K, Cole RN, Cronshaw JM, Matunis MJ, Hart GW.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>12438562</umod:url>
         </umod:xref>
         <umod:misc_notes>When the beta-elimination and Michael addition of dithiothreitol (DTT) (BEMAD) reaction is used with alkylated cysteine a sulfur group is lost leaving the addition of approximately 120.2 in the chemical reaction.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="TMT2plex" full_name="Duplex Tandem Mass Tag®"
                username_of_poster="JUergen.schaefer"
                group_of_poster=""
                date_time_posted="2007-03-01 13:53:36"
                date_time_modified="2007-03-03 18:23:19"
                approved="0"
                record_id="738">
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="225.155833" avge_mass="225.2921"
                     composition="H(20) C(11) 13C N(2) O(2)">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="11"/>
            <umod:element symbol="13C" number="1"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
         <umod:alt_name>Tandem Mass Tag Duplex labelling kit Proteome Sciences</umod:alt_name>
         <umod:xref>
            <umod:text>Juergen.Schaefer@Proteomics.com</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Duplex-TMT® reagents 2TMT-126, 2TMT-127 Masses of the TMT® fragment ions to be quantified: 126.1283 127.1316</umod:misc_notes>
      </umod:mod>
      <umod:mod title="TMT" full_name="Native Tandem Mass Tag®"
                username_of_poster="JUergen.schaefer"
                group_of_poster=""
                date_time_posted="2007-03-02 09:29:50"
                date_time_modified="2007-03-03 18:21:42"
                approved="0"
                record_id="739">
         <umod:specificity hidden="0" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="224.152478" avge_mass="224.2994" composition="H(20) C(12) N(2) O(2)">
            <umod:element symbol="H" number="20"/>
            <umod:element symbol="C" number="12"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
         <umod:xref>
            <umod:text>Juergen.Schaefer@Proteomics.com</umod:text>
            <umod:source>Other</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>This modification describes the \"native\" TMT Reagent without isotopic label.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="ExacTagThiol" full_name="ExacTag Thiol label mass for 2-4-7-10 plex"
                username_of_poster="cparman"
                group_of_poster=""
                date_time_posted="2007-03-02 17:24:48"
                date_time_modified="2007-03-03 18:28:20"
                approved="0"
                record_id="740">
         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="972.365219" avge_mass="972.7268"
                     composition="H(50) C(23) 13C(12) N(8) 15N(6) O(18)">
            <umod:element symbol="H" number="50"/>
            <umod:element symbol="C" number="23"/>
            <umod:element symbol="13C" number="12"/>
            <umod:element symbol="N" number="8"/>
            <umod:element symbol="15N" number="6"/>
            <umod:element symbol="O" number="18"/>
         </umod:delta>
         <umod:alt_name>PerkinElmer ExacTag Thiol kit</umod:alt_name>
         <umod:xref>
            <umod:text>PerkinElmer ExacTag product page</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.perkinelmer.com/exactag</umod:url>
         </umod:xref>
         <umod:misc_notes>Accurate mass for Exactag Thiol labels</umod:misc_notes>
      </umod:mod>
      <umod:mod title="ExacTagAmine" full_name="ExacTag Amine label mass for 2-4-7-10 plex"
                username_of_poster="cparman"
                group_of_poster=""
                date_time_posted="2007-03-02 17:28:02"
                date_time_modified="2007-05-02 14:15:44"
                approved="0"
                record_id="741">
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="1046.347854" avge_mass="1046.8285"
                     composition="H(52) C(25) 13C(12) N(8) 15N(6) O(19) S">
            <umod:element symbol="H" number="52"/>
            <umod:element symbol="C" number="25"/>
            <umod:element symbol="13C" number="12"/>
            <umod:element symbol="N" number="8"/>
            <umod:element symbol="15N" number="6"/>
            <umod:element symbol="O" number="19"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>PerkinElmer ExacTag Amine kit</umod:alt_name>
         <umod:xref>
            <umod:text>PerkinElmer ExacTag product page</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.perkinelmer.com/exactag</umod:url>
         </umod:xref>
         <umod:misc_notes>Accurate mass for Exactag Amine labels. Includes the mass of the conjugation reagent</umod:misc_notes>
      </umod:mod>
      <umod:mod title="NO_SMX_SEMD"
                full_name="Nitroso Sulfamethoxazole Sulphenamide thiol adduct"
                username_of_poster="stewartb"
                group_of_poster=""
                date_time_posted="2007-04-17 23:28:29"
                date_time_modified="2007-04-21 16:55:48"
                approved="0"
                record_id="744">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="252.044287" avge_mass="252.2697"
                     composition="H(10) C(10) N(3) O(3) S">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Naisbitt, D. J., O'Neill, P. M., Pirohamed, M., and Park, B. K.  1996.  Bioorganic and Medicinal Chemistry Letters 6(13):1511-1516.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Synthesis and Reactions of Nitroso Sulphamethoxazole with Biological Nucleophiles: Implications for Immune Mediated Toxicity.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="4-ONE+Delta:H(-2)O(-1)"
                full_name="Dehydrated 4-Oxononenal Michael adduct"
                username_of_poster="stewartb"
                group_of_poster=""
                date_time_posted="2007-03-21 21:21:34"
                date_time_modified="2007-04-08 18:56:36"
                approved="0"
                record_id="743">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="136.088815" avge_mass="136.1910" composition="H(12) C(9) O">
            <umod:element symbol="H" number="12"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Liu. Z., Minkler, P. E., and Sayre, L. M.  Chem. Res. Toxico. 2003, 16, 901-911.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Mass Spectorscopic Characterization of Protein Modification by 4-hydroxy-2-(E)-nonenal and 4-oxo-2-(E)-nonenal</umod:misc_notes>
      </umod:mod>
      <umod:mod title="NO_SMX_SMCT"
                full_name="Nitroso Sulfamethoxazole semimercaptal thiol adduct"
                username_of_poster="stewartb"
                group_of_poster=""
                date_time_posted="2007-04-18 21:37:48"
                date_time_modified="2007-04-21 16:56:19"
                approved="0"
                record_id="745">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="268.039202" avge_mass="268.2691"
                     composition="H(10) C(10) N(3) O(4) S">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Naisbitt, D. J., O'Neill, P. M., Pirohamed, M., and Park, B. K.  1996.  Bioorganic and Medicinal Chemistry Letters 6(13):1511-1516.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Synthesis and Reactions of Nitroso Sulphamethoxazole with Biological Nucleophiles: Implications for Immune Mediated Toxicity.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="NO_SMX_SIMD"
                full_name="Nitroso Sulfamethoxazole Sulfinamide thiol adduct"
                username_of_poster="stewartb"
                group_of_poster=""
                date_time_posted="2007-04-18 21:39:11"
                date_time_modified="2007-04-21 16:56:07"
                approved="0"
                record_id="746">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="267.031377" avge_mass="267.2612"
                     composition="H(9) C(10) N(3) O(4) S">
            <umod:element symbol="H" number="9"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Naisbitt, D. J., O'Neill, P. M., Pirohamed, M., and Park, B. K.  1996.  Bioorganic and Medicinal Chemistry Letters 6(13):1511-1516.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Synthesis and Reactions of Nitroso Sulphamethoxazole with Biological Nucleophiles: Implications for Immune Mediated Toxicity.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Malonyl" full_name="Malonylation of C and S residues"
                username_of_poster="massy"
                group_of_poster=""
                date_time_posted="2007-05-17 14:17:42"
                date_time_modified="2007-05-25 18:34:43"
                approved="0"
                record_id="747">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:delta mono_mass="86.000394" avge_mass="86.0462" composition="H(2) C(3) O(3)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="3"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="3sulfo"
                full_name="derivatization by N-term modification using 3-Sulfobenzoic succinimidyl ester"
                username_of_poster="MaxWis"
                group_of_poster=""
                date_time_posted="2007-05-31 10:15:48"
                date_time_modified="2007-06-24 19:58:07"
                approved="0"
                record_id="748">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="183.983029" avge_mass="184.1693" composition="H(4) C(7) O(4) S">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="7"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="trifluoro" full_name="trifluoroleucine replacement of leucine"
                username_of_poster="UKMSF"
                group_of_poster=""
                date_time_posted="2007-06-13 17:10:33"
                date_time_modified="2007-06-24 19:56:32"
                approved="0"
                record_id="750">
         <umod:specificity hidden="1" site="L" position="Anywhere" classification="Non-standard residue"
                           spec_group="1"/>
         <umod:delta mono_mass="53.971735" avge_mass="53.9714" composition="H(-3) F(3)">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="F" number="3"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="TNBS" full_name="tri nitro benzene" username_of_poster="DelphineP"
                group_of_poster=""
                date_time_posted="2007-06-21 13:36:03"
                date_time_modified="2007-06-24 19:58:58"
                approved="0"
                record_id="751">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="210.986535" avge_mass="211.0886" composition="H C(6) N(3) O(6)">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="6"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Biotin-phenacyl"
                full_name="Alkylation by biotinylated form of phenacyl bromide"
                username_of_poster="Sandeep"
                group_of_poster=""
                date_time_posted="2007-09-14 23:07:12"
                date_time_modified="2007-10-03 15:42:46"
                approved="0"
                record_id="774">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:delta mono_mass="626.263502" avge_mass="626.7270"
                     composition="H(38) C(29) N(8) O(6) S">
            <umod:element symbol="H" number="38"/>
            <umod:element symbol="C" number="29"/>
            <umod:element symbol="N" number="8"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>4-bromophenacyl bromide [99-73-0]</umod:text>
            <umod:source>CAS Registry</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>428399</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>phenacyl bromide conjugated with a linker and biotin tag, details not published yet</umod:misc_notes>
      </umod:mod>
      <umod:mod title="DTT_C:2H(6)"
                full_name="Isotopically labeled Dithiothreitol (DTT) modification of cysteines"
                username_of_poster="chalkley"
                group_of_poster=""
                date_time_posted="2007-07-10 20:44:56"
                date_time_modified="2007-07-10 21:10:28"
                approved="0"
                record_id="764">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="126.062161" avge_mass="126.2071"
                     composition="H(2) 2H(6) C(4) O(2) S">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="2H" number="6"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>Cleland's reagent</umod:alt_name>
         <umod:xref>
            <umod:text>Vosseller K, Hansen KC, Chalkley RJ, Trinidad JC, Wells L, Hart GW, Burlingame AL. Proteomics. 2005 5(2):388-98. Quantitative analysis of both protein expression and serine / threonine post-translational modifications through stable isotope labeling with dithiothreitol.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>15648052</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Can be used for quantitative analysis of cysteine-containing peptides. Same reaction can be used for quantitative analysis of O-linked post-translational modifications to serines and threonines, but then the modification is 16 Da more in mass; i.e. isotopically labeled reagent adds 142 Da in mass.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="lapachenole" full_name="lapachenole photochemically added to cysteine"
                username_of_poster="hmfales"
                group_of_poster=""
                date_time_posted="2007-08-17 22:22:15"
                date_time_modified="2007-09-07 16:52:37"
                approved="0"
                record_id="771">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>Simple cyclic compound C16H16O2 adds to cysteine forming fluorescent derivative.</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="240.115030" avge_mass="240.2970" composition="H(16) C(16) O(2)">
            <umod:element symbol="H" number="16"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Biochemistry 2005 vol 44 pp 1833-1845</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1021/bi048228c</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(5)" full_name="13C(5) Silac label" username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2007-08-22 18:36:11"
                date_time_modified="2007-08-22 18:36:11"
                approved="1"
                record_id="772">
         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Result of Arg to Pro conversion of 13C(6) labelled Arg</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="5.016774" avge_mass="4.9633" composition="C(-5) 13C(5)">
            <umod:element symbol="C" number="-5"/>
            <umod:element symbol="13C" number="5"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="maleimide" full_name="maleimide" username_of_poster="mjayson"
                group_of_poster=""
                date_time_posted="2007-09-05 23:31:52"
                date_time_modified="2007-09-06 11:28:09"
                approved="0"
                record_id="773">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="97.016378" avge_mass="97.0721" composition="H(3) C(4) N O(2)">
            <umod:element symbol="H" number="3"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="IDEnT" full_name="Isotope Distribution Encoded Tag"
                username_of_poster="chalkley"
                group_of_poster=""
                date_time_posted="2007-07-10 20:14:50"
                date_time_modified="2007-07-15 20:04:29"
                approved="0"
                record_id="762">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="214.990469" avge_mass="216.0640" composition="H(7) C(9) N O Cl(2)">
            <umod:element symbol="H" number="7"/>
            <umod:element symbol="C" number="9"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="Cl" number="2"/>
         </umod:delta>
         <umod:alt_name>2,4-dichlorobenzylcarbamidomethyl</umod:alt_name>
         <umod:xref>
            <umod:text>Analytical Chemistry (2000) 72 6 1112-1118</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>10740847</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Modified peptides identified by isotope pattern.  Restriction to cysteine-containing peptides combined with high mass accuracy allows peptide identification.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="DTT_ST:2H(6)"
                full_name="Isotopically labeled Dithiothreitol (DTT) modification of serines or threonines"
                username_of_poster="chalkley"
                group_of_poster=""
                date_time_posted="2007-07-10 20:34:46"
                date_time_modified="2007-07-10 21:11:44"
                approved="0"
                record_id="763">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="142.039317" avge_mass="142.2727"
                     composition="H(2) 2H(6) C(4) O S(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="2H" number="6"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="O" number="1"/>
            <umod:element symbol="S" number="2"/>
         </umod:delta>
         <umod:alt_name>Cleland's reagent</umod:alt_name>
         <umod:xref>
            <umod:text>15648052</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Vosseller K, Hansen KC, Chalkley RJ, Trinidad JC, Wells L, Hart GW, Burlingame AL. Proteomics. 2005 5(2):388-98.  Quantitative analysis of both protein expression and serine / threonine post-translational modifications through stable isotope labeling with dithiothreitol.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Can be used for quantitative analysis of O-linked post-translational modifications.  Same reaction can be used for quantitative analysis of cysteine-containing peptides, but then the modification is 16 Da less in mass; i.e. isotopically labeled reagent adds 126 Da in mass.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Met-loss"
                full_name="Removal of initiator methionine from protein N-terminus"
                username_of_poster="chalkley"
                group_of_poster=""
                date_time_posted="2007-07-10 22:40:00"
                date_time_modified="2007-07-15 20:01:35"
                approved="0"
                record_id="765">
         <umod:specificity hidden="1" site="M" position="Protein N-term" classification="Co-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-131.040485" avge_mass="-131.1961"
                     composition="H(-9) C(-5) N(-1) O(-1) S(-1)">
            <umod:element symbol="H" number="-9"/>
            <umod:element symbol="C" number="-5"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Biochemistry (1987) 26 8242-8246</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>3327521</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>N-terminal initiator methionine is removed by a methionine aminopeptidase from proteins where the residue following the methionine is Ala, Cys, Gly, Pro, Ser, Thr or Val.  This is generally the final N-terminal state for proteins where the following residue was a Cys, Pro or Val.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Met-loss+Acetyl"
                full_name="Removal of initiator methionine from protein N-terminus, then acetylation of the new N-terminus"
                username_of_poster="chalkley"
                group_of_poster=""
                date_time_posted="2007-07-10 22:57:12"
                date_time_modified="2007-07-15 20:01:06"
                approved="0"
                record_id="766">
         <umod:specificity hidden="1" site="M" position="Protein N-term" classification="Co-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-89.029920" avge_mass="-89.1594"
                     composition="H(-7) C(-3) N(-1) S(-1)">
            <umod:element symbol="H" number="-7"/>
            <umod:element symbol="C" number="-3"/>
            <umod:element symbol="N" number="-1"/>
            <umod:element symbol="S" number="-1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>3327521</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Biochemistry (1987) 26 8242-8246</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>The N-terminal initiator methionine is removed by a methionine aminopeptidase from proteins whose residue following the methionine is Ala, Cys, Gly, Pro, Ser, Thr or Val. Proteins whose following residue was Ala, Gly, Ser or Thr are then acetylated by an N(alpha)-acetyltransferase on the new N-terminus.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Menadione-HQ" full_name="Menadione hydroquinone derivative"
                username_of_poster="catsriku"
                group_of_poster=""
                date_time_posted="2007-07-12 07:35:07"
                date_time_modified="2007-07-15 20:05:56"
                approved="0"
                record_id="767">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="172.052430" avge_mass="172.1800" composition="H(8) C(11) O(2)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="11"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15939799</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Carboxymethyl:13C(2)"
                full_name="Iodoacetic acid derivative w/ 13C label"
                username_of_poster="mpcusack"
                group_of_poster=""
                date_time_posted="2007-09-18 19:26:42"
                date_time_modified="2008-06-22 12:00:27"
                approved="0"
                record_id="775">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="60.012189" avge_mass="60.0214" composition="H(2) 13C(2) O(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="13C" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>Carboxymethylation w/ 13C label</umod:alt_name>
         <umod:xref>
            <umod:text>B. Schilling, C.B. Yoo, C.J. Collins, B.W. Gibson, Determining Cysteine Oxidation Status Using Differential Alkylation, Int. J. Mass Spectrom., 2004, 236 (1-3), 117-121</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1016/j.ijms.2004.06.004</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="NEM:2H(5)" full_name="D5 N-ethylmaleimide on cysteines"
                username_of_poster="mpcusack"
                group_of_poster=""
                date_time_posted="2007-09-18 19:49:39"
                date_time_modified="2007-09-28 10:37:50"
                approved="0"
                record_id="776">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="130.079062" avge_mass="130.1561"
                     composition="H(2) 2H(5) C(6) N O(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="2H" number="5"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>CysNEM D5</umod:alt_name>
         <umod:xref>
            <umod:text>reaction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.chemistry.ucsc.edu/~fink/231/Image118.gif</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12777388</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>11813307</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Gly-loss+Amide"
                full_name="Enzymatic glycine removal leaving an amidated C-terminus"
                username_of_poster="timothyr"
                group_of_poster=""
                date_time_posted="2008-02-06 09:33:39"
                date_time_modified="2008-02-15 05:34:31"
                approved="0"
                record_id="822">
         <umod:specificity hidden="1" site="G" position="Any C-term" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="-58.005479" avge_mass="-58.0361" composition="H(-2) C(-2) O(-2)">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="O" number="-2"/>
         </umod:delta>
         <umod:alt_name>Amidation requires presence of glycine at peptide terminus</umod:alt_name>
         <umod:xref>
            <umod:text>Bradbury, A.F. and D.G. Smyth, Peptide amidation. Trends Biochem Sci, 1991. 16(3): p. 112-5.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="TMPP-Ac"
                full_name="tris(2,4,6-trimethoxyphenyl)phosphonium acetic acid N-hydroxysuccinimide ester derivative"
                username_of_poster="unimod"
                group_of_poster=""
                date_time_posted="2008-02-20 14:12:31"
                date_time_modified="2008-02-20 14:23:30"
                approved="0"
                record_id="827">
         <umod:specificity hidden="1" site="N-term" position="Any N-term"
                           classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="573.188959" avge_mass="573.5480" composition="H(34) C(29) O(10) P">
            <umod:element symbol="H" number="34"/>
            <umod:element symbol="C" number="29"/>
            <umod:element symbol="O" number="10"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Weibin Chen et. al., Anal. Chem.2007, 79,1583-1590</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1021/ac061670b</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(6)+GlyGly" full_name="13C6 labeled ubiquitinylation residue"
                username_of_poster="glick2"
                group_of_poster=""
                date_time_posted="2007-12-02 22:45:39"
                date_time_modified="2008-07-04 19:11:02"
                approved="0"
                record_id="799">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="120.063056" avge_mass="120.0586"
                     composition="H(6) C(-2) 13C(6) N(2) O(2)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&amp;cmd=Retrieve&amp;dopt=AbstractPlus&amp;list_uids=12716131&amp;itool=pubmed_docsum</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Peng J, Schwartz D, Elias JE, Thoreen CC, Cheng D, Marsischky G, Roelofs J, Finley D, Gygi SP.

Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>http://www.ncbi.nlm.nih.gov/sites/entrez?db=pubmed&amp;cmd=Retrieve&amp;dopt=AbstractPlus&amp;list_uids=12872131&amp;itool=pubmed_docsum</umod:url>
         </umod:xref>
         <umod:misc_notes>The two glycine residues left on SILAC labeled ubiquitinylated lysine after tryptic digestion</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Arg-&gt;Npo" full_name="Arginine replacement by Nitropyrimidyl ornithine"
                username_of_poster="Kramerh"
                group_of_poster=""
                date_time_posted="2008-04-10 15:35:22"
                date_time_modified="2008-04-21 18:30:45"
                approved="0"
                record_id="837">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="80.985078" avge_mass="81.0297" composition="H(-1) C(3) N O(2)">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>JBC 258(1) 203-207 1983</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.jbc.org/cgi/reprint/258/1/203.pdf</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:2H(4)+Acetyl" full_name="Acetyl 4,4,5,5-D4 Lysine"
                username_of_poster="Raghothama"
                group_of_poster=""
                date_time_posted="2008-03-24 17:25:15"
                date_time_modified="2008-04-02 10:17:08"
                approved="0"
                record_id="834">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Both isotopiclabel and post translational mod</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="46.035672" avge_mass="46.0613" composition="H(-2) 2H(4) C(2) O">
            <umod:element symbol="H" number="-2"/>
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Acetyl_K4</umod:alt_name>
         <umod:misc_notes>For SILAC experiments, + PTM</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Pentylamine"
                full_name="Labeling transglutaminase substrate on glutamine side chain"
                username_of_poster="mengyi"
                group_of_poster=""
                date_time_posted="2007-12-05 11:08:02"
                date_time_modified="2007-12-14 17:52:16"
                approved="0"
                record_id="801">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="85.089149" avge_mass="85.1475" composition="H(11) C(5) N">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="PentylamineBiotin"
                full_name="Used for labeling glutamine-donor substrate of transglutaminase"
                username_of_poster="mengyi"
                group_of_poster=""
                date_time_posted="2007-12-03 13:56:58"
                date_time_modified="2007-12-04 09:00:49"
                approved="0"
                record_id="800">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="311.166748" avge_mass="311.4429"
                     composition="H(25) C(15) N(3) O(2) S">
            <umod:element symbol="H" number="25"/>
            <umod:element symbol="C" number="15"/>
            <umod:element symbol="N" number="3"/>
            <umod:element symbol="O" number="2"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Pierce EZ-Link Pentylamine-Biotin</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=01031206</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Dihydroxyimidazolidine" full_name="Dihydroxy methylglyoxal adduct"
                username_of_poster="kimzey"
                group_of_poster=""
                date_time_posted="2008-03-04 00:00:29"
                date_time_modified="2008-05-22 00:32:41"
                approved="0"
                record_id="830">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Multiple"
                           spec_group="1"/>
         <umod:delta mono_mass="72.021129" avge_mass="72.0627" composition="H(4) C(3) O(2)">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>J. Mass. Spectrom.  2007; 42:89-100.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1002/jms.1144</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="DFDNB" full_name="Addition of DFDNB crosslinker"
                username_of_poster="Larsenmarsen"
                group_of_poster=""
                date_time_posted="2008-02-13 15:35:40"
                date_time_modified="2008-03-05 16:48:47"
                approved="0"
                record_id="825">
         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
                           spec_group="3"/>
         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Chemical derivative"
                           spec_group="4"/>
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="203.998263" avge_mass="204.0879"
                     composition="H(2) C(6) N(2) O(4) F(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="6"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="4"/>
            <umod:element symbol="F" number="2"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Chen, X., et al. (1999). Anal. Biochem. 273, 192-203.</umod:text>
            <umod:source>Other</umod:source>
            <umod:url>http://www.piercenet.com/products/browse.cfm?fldID=02030220</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Kornblatt, J.A. and Lake, D.F. (1980). Crosslinking of cytochrome oxidase subunits with difluorodinitrobenzene. Can J. Biochem. 58, 219-224.</umod:text>
            <umod:source>Other</umod:source>
            <umod:url>http://www.piercenet.com/products/browse.cfm?fldID=02030220</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Cy3b-maleimide" full_name="fluorescent dye that labels cysteines"
                username_of_poster="kfinan"
                group_of_poster=""
                date_time_posted="2008-02-01 16:03:09"
                date_time_modified="2008-02-15 14:09:55"
                approved="0"
                record_id="821">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="796.238984" avge_mass="796.8086"
                     composition="H(39) C(39) N(4) O(9) F(3) S">
            <umod:element symbol="H" number="39"/>
            <umod:element symbol="C" number="39"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="9"/>
            <umod:element symbol="F" number="3"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:alt_name>Cy3b meleimide reacted with Cysteine</umod:alt_name>
         <umod:xref>
            <umod:text>Article describing design of Cy3B</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://www.springerlink.com/content/q3u3271467573733/</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>Amersham website for chemical</umod:text>
            <umod:source>Other</umod:source>
            <umod:url>http://www1.gelifesciences.com/APTRIX/upp01077.nsf/Content/Products?OpenDocument&amp;parentid=658513&amp;moduleid=166300</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Hex1HexNAc1" full_name="Hex1HexNAc1" username_of_poster="julienjardin"
                group_of_poster=""
                date_time_posted="2007-10-12 13:16:23"
                date_time_modified="2007-10-20 19:28:06"
                approved="0"
                record_id="793">
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="2"/>
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
                           spec_group="1"/>
         <umod:delta mono_mass="365.132196" avge_mass="365.3331" composition="Hex HexNAc">
            <umod:element symbol="H" number="23"/>
            <umod:element symbol="C" number="14"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="10"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Saito T., Itoh T.; Journal of dairy Science, 75 (1992). p1768.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="AEC-MAEC:2H(4)" full_name="deuterium cysteamine modification to S or T"
                username_of_poster="zwang23"
                group_of_poster=""
                date_time_posted="2007-10-03 19:41:19"
                date_time_modified="2007-10-08 13:44:02"
                approved="0"
                record_id="792">
         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Isotopic label"
                           spec_group="2"/>
         <umod:delta mono_mass="63.044462" avge_mass="63.1580" composition="H 2H(4) C(2) N O(-1) S">
            <umod:element symbol="H" number="1"/>
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="-1"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="BMOE" full_name="Addition of BMOE crosslinker"
                username_of_poster="Larsenmarsen"
                group_of_poster=""
                date_time_posted="2008-02-13 15:28:55"
                date_time_modified="2008-03-05 16:47:02"
                approved="0"
                record_id="824">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="220.048407" avge_mass="220.1815" composition="H(8) C(10) N(2) O(4)">
            <umod:element symbol="H" number="8"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Chen, L.L., Rosa, J.J., Turner, S. and Pepinsky, R.B. (1991). Production of multimeric forms of CD4 through a sugar-based crosslinking strategy. J. Biol. Chem. 266(27), 18237-18243</umod:text>
            <umod:source>Other</umod:source>
            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=02030208</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Biotin-PEO4-hydrazide"
                full_name="Pierce EZ link biotin hydrazide prod no. 21360"
                username_of_poster="MCole18"
                group_of_poster=""
                date_time_posted="2007-12-12 15:23:23"
                date_time_modified="2007-12-14 18:09:17"
                approved="0"
                record_id="811">
         <umod:specificity hidden="1" site="C-term" position="Anywhere"
                           classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>hydrazide reacts at any activated carboxyl group</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="487.246455" avge_mass="487.6134"
                     composition="H(37) C(21) N(5) O(6) S">
            <umod:element symbol="H" number="37"/>
            <umod:element symbol="C" number="21"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="S" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Pierce product page</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.piercenet.com/products/browse.cfm?fldID=C4FE82D4-DD06-493C-8EC4-9C1D7F83211B</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(6)+Acetyl" full_name="Acetyl 13C(6) Silac label"
                username_of_poster="Raghothama"
                group_of_poster=""
                date_time_posted="2008-03-24 17:33:44"
                date_time_modified="2008-04-02 10:14:57"
                approved="0"
                record_id="835">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>SILAC and PTM</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="48.030694" avge_mass="47.9926" composition="H(2) C(-4) 13C(6) O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="-4"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(6)15N(2)+Acetyl" full_name="Acetyl_13C(6) 15N(2) Silac label"
                username_of_poster="Raghothama"
                group_of_poster=""
                date_time_posted="2008-03-24 17:35:52"
                date_time_modified="2008-04-02 10:13:59"
                approved="0"
                record_id="836">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="50.024764" avge_mass="49.9794"
                     composition="H(2) C(-4) 13C(6) N(-2) 15N(2) O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="-4"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="15N" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>Acetyl_heavy lysine</umod:alt_name>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="EQIGG" full_name="Sumo mutant Smt3-WT tail following trypsin digestion"
                username_of_poster="Magnojunqueira"
                group_of_poster=""
                date_time_posted="2008-05-13 16:56:23"
                date_time_modified="2008-05-17 18:58:13"
                approved="0"
                record_id="846">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="484.228162" avge_mass="484.5035" composition="H(32) C(20) N(6) O(8)">
            <umod:element symbol="H" number="32"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="6"/>
            <umod:element symbol="O" number="8"/>
         </umod:delta>
         <umod:alt_name>Sumoylation</umod:alt_name>
         <umod:xref>
            <umod:text>Wohlschlegel, J. A. et al., J Proteome Res. 5 761 2006</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url>http://dx.doi.org/10.1021/pr050451o</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="cGMP" full_name="S-guanylation" username_of_poster="atsushiirie"
                group_of_poster=""
                date_time_posted="2008-06-21 09:02:53"
                date_time_modified="2008-07-04 19:14:47"
                approved="0"
                record_id="849">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="344.039610" avge_mass="344.1974"
                     composition="H(11) C(10) N(5) O(7) P">
            <umod:element symbol="H" number="11"/>
            <umod:element symbol="C" number="10"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="7"/>
            <umod:element symbol="P" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Nat Chem Biol. 3: 727-735, 2007</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>17906641</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Protein which is posttranslationally modified by the attachment of cGMP on the sulfur atom of one or more cysteine residues.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="cGMP+RMP-loss" full_name="S-guanylation-2"
                username_of_poster="atsushiirie"
                group_of_poster=""
                date_time_posted="2008-06-21 09:06:56"
                date_time_modified="2008-07-04 19:22:39"
                approved="0"
                record_id="851">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="150.041585" avge_mass="150.1182" composition="H(4) C(5) N(5) O">
            <umod:element symbol="H" number="4"/>
            <umod:element symbol="C" number="5"/>
            <umod:element symbol="N" number="5"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>17906641</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Nat Chem Biol. 3: 727-735, 2007</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:misc_notes>Protein which is posttranslationally modified by the attachment of cGMP that has lost ribose 3\',5\'-cyclic monophosphate moiety on the sulfur atom of one or more cysteine residues.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="Arg2PG" full_name="Adduct of phenylglyoxal with Arg"
                username_of_poster="Kramerh"
                group_of_poster=""
                date_time_posted="2008-05-16 11:07:51"
                date_time_modified="2008-05-17 19:01:10"
                approved="0"
                record_id="848">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                           spec_group="1">
            <umod:misc_notes>The reaction product of Arg with phenylglyoxal has been shown to be a 2:1 adduct</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="266.057909" avge_mass="266.2482" composition="H(10) C(16) O(4)">
            <umod:element symbol="H" number="10"/>
            <umod:element symbol="C" number="16"/>
            <umod:element symbol="O" number="4"/>
         </umod:delta>
         <umod:xref>
            <umod:text>PMID 11698400rnLigand-selective modulation of the permeability transition pore by arginine modification. Opposing effects of p-hydroxyphenylglyoxal and phenylglyoxal.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/11698400?ordinalpos=39&amp;itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>PMID 5723461rnThe reaction of phenylglyoxal with arginine residues in proteins.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/5723461?ordinalpos=517&amp;itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum</umod:url>
         </umod:xref>
         <umod:xref>
            <umod:text>PMID 11945751rnReaction of arginine residues in basic pancreatic trypsin inhibitor with phenylglyoxal.</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/11945751?ordinalpos=514&amp;itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:2H(4)+GlyGly" full_name="Ubiquitination 2H4 lysine"
                username_of_poster="Raghothama"
                group_of_poster=""
                date_time_posted="2008-06-27 14:28:36"
                date_time_modified="2008-08-13 20:29:26"
                approved="0"
                record_id="853">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                           spec_group="1"/>
         <umod:delta mono_mass="118.068034" avge_mass="118.1273"
                     composition="H(2) 2H(4) C(4) N(2) O(2)">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="C" number="4"/>
            <umod:element symbol="N" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Label:13C(8)15N(2)" full_name="13C(8) 15N(2) Silac label"
                username_of_poster="nedamoc"
                group_of_poster=""
                date_time_posted="2008-06-30 20:11:08"
                date_time_modified="2008-07-04 19:07:25"
                approved="0"
                record_id="854">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:delta mono_mass="10.020909" avge_mass="9.9281"
                     composition="C(-8) 13C(8) N(-2) 15N(2)">
            <umod:element symbol="C" number="-8"/>
            <umod:element symbol="13C" number="8"/>
            <umod:element symbol="N" number="-2"/>
            <umod:element symbol="15N" number="2"/>
         </umod:delta>
      </umod:mod>
      <umod:mod title="Label:13C(1)2H(3)" full_name="SILAC" username_of_poster="msalek"
                group_of_poster=""
                date_time_posted="2008-08-11 13:43:25"
                date_time_modified="2008-08-14 18:16:30"
                approved="0"
                record_id="862">
         <umod:specificity hidden="1" site="M" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Isotopic labeled methionine SILAC</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="4.022185" avge_mass="4.0111" composition="H(-3) 2H(3) C(-1) 13C">
            <umod:element symbol="H" number="-3"/>
            <umod:element symbol="2H" number="3"/>
            <umod:element symbol="C" number="-1"/>
            <umod:element symbol="13C" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ZGB" full_name="NHS ester linked Green Fluorescent Bodipy Dye"
                username_of_poster="JBowden"
                group_of_poster=""
                date_time_posted="2008-07-30 14:51:06"
                date_time_modified="2008-08-14 18:13:03"
                approved="0"
                record_id="861">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Other"
                           spec_group="2"/>
         <umod:delta mono_mass="757.373016" avge_mass="757.7182"
                     composition="H(52) B C(37) N(6) O(6) F(2) S">
            <umod:element symbol="H" number="52"/>
            <umod:element symbol="C" number="37"/>
            <umod:element symbol="N" number="6"/>
            <umod:element symbol="O" number="6"/>
            <umod:element symbol="F" number="2"/>
            <umod:element symbol="S" number="1"/>
            <umod:element symbol="B" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>Created for Commercial use by ZDye.  Being utilized in proteomic and peptidomic research soon to be published</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.zdye.com/</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="MG-H1" full_name="Methylglyoxal-derived hydroimidazolone"
                username_of_poster="AndrewW"
                group_of_poster=""
                date_time_posted="2008-07-24 14:41:07"
                date_time_modified="2008-07-31 17:14:35"
                approved="0"
                record_id="859">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="54.010565" avge_mass="54.0474" composition="H(2) C(3) O">
            <umod:element symbol="H" number="2"/>
            <umod:element symbol="C" number="3"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>15377717</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="G-H1" full_name="Glyoxal-derived hydroimiadazolone"
                username_of_poster="AndrewW"
                group_of_poster=""
                date_time_posted="2008-07-24 14:44:11"
                date_time_modified="2008-07-31 17:16:39"
                approved="0"
                record_id="860">
         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other" spec_group="1"/>
         <umod:delta mono_mass="39.994915" avge_mass="40.0208" composition="C(2) O">
            <umod:element symbol="C" number="2"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:xref>
            <umod:text>17143934</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
      </umod:mod>
      <umod:mod title="Label:13C(6)15N(2)+GlyGly" full_name="13C(6) 15N(2) Lysine glygly"
                username_of_poster="Raghothama"
                group_of_poster=""
                date_time_posted="2008-08-13 21:56:52"
                date_time_modified="2008-08-14 18:22:40"
                approved="0"
                record_id="864">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1">
            <umod:misc_notes>Used in SILAC PTM (glygly) experiment</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="122.057126" avge_mass="122.0454"
                     composition="H(6) C(-2) 13C(6) 15N(2) O(2)">
            <umod:element symbol="H" number="6"/>
            <umod:element symbol="C" number="-2"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="15N" number="2"/>
            <umod:element symbol="O" number="2"/>
         </umod:delta>
         <umod:alt_name>heavy glygly lysine</umod:alt_name>
         <umod:xref>
            <umod:text>12716131</umod:text>
            <umod:source>PubMed PMID</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Silac introduction</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
         </umod:xref>
      </umod:mod>
      <umod:mod title="ICPL:13C(6)2H(4)"
                full_name="Bruker Daltonics SERVA-ICPL(TM) quantification chemistry, +10 Da form"
                username_of_poster="suckau"
                group_of_poster=""
                date_time_posted="2008-09-03 15:17:21"
                date_time_modified="2008-09-12 11:59:23"
                approved="0"
                record_id="866">
         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Isotopic label"
                           spec_group="3">
            <umod:misc_notes>Use when labelling post-digest</umod:misc_notes>
         </umod:specificity>
         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                           spec_group="1"/>
         <umod:specificity hidden="0" site="N-term" position="Protein N-term"
                           classification="Isotopic label"
                           spec_group="2">
            <umod:misc_notes>Use when labelling pre-digest</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="115.066700" avge_mass="115.0747"
                     composition="H(-1) 2H(4) 13C(6) N O">
            <umod:element symbol="H" number="-1"/>
            <umod:element symbol="2H" number="4"/>
            <umod:element symbol="13C" number="6"/>
            <umod:element symbol="N" number="1"/>
            <umod:element symbol="O" number="1"/>
         </umod:delta>
         <umod:alt_name>ICPL_10</umod:alt_name>
         <umod:xref>
            <umod:text>Schmidt A, Kellermann J, Lottspeich F (2005): A novel strategy for quantitative proteomics using isotope-coded protein labels. Proteomics 5: 4-15.</umod:text>
            <umod:source>Journal</umod:source>
            <umod:url/>
         </umod:xref>
         <umod:xref>
            <umod:text>Bruker Daltonics order reference</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://www.bdal.de/life-science-tools/care-consumables-more/icpl-kit.html</umod:url>
         </umod:xref>
         <umod:misc_notes>Attention: As the digest is typically applied AFTER ICPL labeling, only ProteinN-term labeling and Lys-specific labeling is applied.</umod:misc_notes>
      </umod:mod>
      <umod:mod title="QQQTGG" full_name="SUMOylation by SUMO-2/3" username_of_poster="oosula"
                group_of_poster=""
                date_time_posted="2008-09-09 17:09:04"
                date_time_modified="2008-09-12 18:18:08"
                approved="0"
                record_id="877">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1">
            <umod:misc_notes>This peptide is generated from a trypsin/chymotrypsin dual digest</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="617.276903" avge_mass="617.6095"
                     composition="H(39) C(23) N(9) O(11)">
            <umod:element symbol="H" number="39"/>
            <umod:element symbol="C" number="23"/>
            <umod:element symbol="N" number="9"/>
            <umod:element symbol="O" number="11"/>
         </umod:delta>
         <umod:alt_name>GlnGlnGlnThrGlyGly</umod:alt_name>
      </umod:mod>
      <umod:mod title="QEQTGG" full_name="SUMOylation by SUMO-1" username_of_poster="oosula"
                group_of_poster=""
                date_time_posted="2008-09-09 17:02:45"
                date_time_modified="2008-09-12 18:16:39"
                approved="0"
                record_id="876">
         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1">
            <umod:misc_notes>This peptide is generated from a trypsin/chymotrypsin dual digest.</umod:misc_notes>
         </umod:specificity>
         <umod:delta mono_mass="618.260919" avge_mass="618.5942"
                     composition="H(38) C(23) N(8) O(12)">
            <umod:element symbol="H" number="38"/>
            <umod:element symbol="C" number="23"/>
            <umod:element symbol="N" number="8"/>
            <umod:element symbol="O" number="12"/>
         </umod:delta>
         <umod:alt_name>GlnGluGlnThrGlyGly</umod:alt_name>
      </umod:mod>
      <umod:mod title="Bodipy" full_name="Bodipy modifications onto cysteine"
                username_of_poster="anikolakakis"
                group_of_poster=""
                date_time_posted="2008-09-10 20:24:53"
                date_time_modified="2008-09-12 18:30:57"
                approved="0"
                record_id="878">
         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                           spec_group="1"/>
         <umod:delta mono_mass="414.167478" avge_mass="414.2135"
                     composition="H(21) B C(20) N(4) O(3) F(2)">
            <umod:element symbol="H" number="21"/>
            <umod:element symbol="C" number="20"/>
            <umod:element symbol="N" number="4"/>
            <umod:element symbol="O" number="3"/>
            <umod:element symbol="F" number="2"/>
            <umod:element symbol="B" number="1"/>
         </umod:delta>
         <umod:alt_name>Which one?</umod:alt_name>
         <umod:xref>
            <umod:text>Invitrogen BODIPY Handbook</umod:text>
            <umod:source>Misc. URL</umod:source>
            <umod:url>http://probes.invitrogen.com/handbook/sections/0104.html</umod:url>
         </umod:xref>
      </umod:mod>
   </umod:modifications>
   <umod:amino_acids>
      <umod:aa title="-" three_letter="" full_name="" mono_mass="0.0" avge_mass="0.0"/>
      <umod:aa title="A" three_letter="Ala" full_name="Alanine" mono_mass="71.037114"
               avge_mass="71.0779">
         <umod:element symbol="H" number="5"/>
         <umod:element symbol="C" number="3"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="R" three_letter="Arg" full_name="Arginine" mono_mass="156.101111"
               avge_mass="156.1857">
         <umod:element symbol="H" number="12"/>
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="N" number="4"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="N" three_letter="Asn" full_name="Asparagine" mono_mass="114.042927"
               avge_mass="114.1026">
         <umod:element symbol="H" number="6"/>
         <umod:element symbol="C" number="4"/>
         <umod:element symbol="N" number="2"/>
         <umod:element symbol="O" number="2"/>
      </umod:aa>
      <umod:aa title="D" three_letter="Asp" full_name="Aspartic acid" mono_mass="115.026943"
               avge_mass="115.0874">
         <umod:element symbol="H" number="5"/>
         <umod:element symbol="C" number="4"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="3"/>
      </umod:aa>
      <umod:aa title="C" three_letter="Cys" full_name="Cysteine" mono_mass="103.009185"
               avge_mass="103.1429">
         <umod:element symbol="H" number="5"/>
         <umod:element symbol="C" number="3"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
         <umod:element symbol="S" number="1"/>
      </umod:aa>
      <umod:aa title="E" three_letter="Glu" full_name="Glutamic acid" mono_mass="129.042593"
               avge_mass="129.114">
         <umod:element symbol="H" number="7"/>
         <umod:element symbol="C" number="5"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="3"/>
      </umod:aa>
      <umod:aa title="Q" three_letter="Gln" full_name="Glutamine" mono_mass="128.058578"
               avge_mass="128.1292">
         <umod:element symbol="H" number="8"/>
         <umod:element symbol="C" number="5"/>
         <umod:element symbol="N" number="2"/>
         <umod:element symbol="O" number="2"/>
      </umod:aa>
      <umod:aa title="G" three_letter="Gly" full_name="Glycine" mono_mass="57.021464"
               avge_mass="57.0513">
         <umod:element symbol="H" number="3"/>
         <umod:element symbol="C" number="2"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="H" three_letter="His" full_name="Histidine" mono_mass="137.058912"
               avge_mass="137.1393">
         <umod:element symbol="H" number="7"/>
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="N" number="3"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="I" three_letter="Ile" full_name="Isoleucine" mono_mass="113.084064"
               avge_mass="113.1576">
         <umod:element symbol="H" number="11"/>
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="L" three_letter="Leu" full_name="Leucine" mono_mass="113.084064"
               avge_mass="113.1576">
         <umod:element symbol="H" number="11"/>
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="K" three_letter="Lys" full_name="Lysine" mono_mass="128.094963"
               avge_mass="128.1723">
         <umod:element symbol="H" number="12"/>
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="N" number="2"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="M" three_letter="Met" full_name="Methionine" mono_mass="131.040485"
               avge_mass="131.1961">
         <umod:element symbol="H" number="9"/>
         <umod:element symbol="C" number="5"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
         <umod:element symbol="S" number="1"/>
      </umod:aa>
      <umod:aa title="F" three_letter="Phe" full_name="Phenylalanine" mono_mass="147.068414"
               avge_mass="147.1739">
         <umod:element symbol="H" number="9"/>
         <umod:element symbol="C" number="9"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="P" three_letter="Pro" full_name="Proline" mono_mass="97.052764"
               avge_mass="97.1152">
         <umod:element symbol="H" number="7"/>
         <umod:element symbol="C" number="5"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="S" three_letter="Ser" full_name="Serine" mono_mass="87.032028"
               avge_mass="87.0773">
         <umod:element symbol="H" number="5"/>
         <umod:element symbol="C" number="3"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="2"/>
      </umod:aa>
      <umod:aa title="T" three_letter="Thr" full_name="Threonine" mono_mass="101.047679"
               avge_mass="101.1039">
         <umod:element symbol="H" number="7"/>
         <umod:element symbol="C" number="4"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="2"/>
      </umod:aa>
      <umod:aa title="W" three_letter="Trp" full_name="Tryptophan" mono_mass="186.079313"
               avge_mass="186.2099">
         <umod:element symbol="H" number="10"/>
         <umod:element symbol="C" number="11"/>
         <umod:element symbol="N" number="2"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="Y" three_letter="Tyr" full_name="Tyrosine" mono_mass="163.063329"
               avge_mass="163.1733">
         <umod:element symbol="H" number="9"/>
         <umod:element symbol="C" number="9"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="2"/>
      </umod:aa>
      <umod:aa title="V" three_letter="Val" full_name="Valine" mono_mass="99.068414"
               avge_mass="99.1311">
         <umod:element symbol="H" number="9"/>
         <umod:element symbol="C" number="5"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
      <umod:aa title="N-term" three_letter="N-term" full_name="N-term" mono_mass="1.007825"
               avge_mass="1.0079">
         <umod:element symbol="H" number="1"/>
      </umod:aa>
      <umod:aa title="C-term" three_letter="C-term" full_name="C-term" mono_mass="17.00274"
               avge_mass="17.0073">
         <umod:element symbol="H" number="1"/>
         <umod:element symbol="O" number="1"/>
      </umod:aa>
   </umod:amino_acids>
   <umod:mod_bricks>
      <umod:brick title="-" full_name="" mono_mass="0" avge_mass="0"/>
      <umod:brick title="H" full_name="Hydrogen" mono_mass="1.007825035" avge_mass="1.00794">
         <umod:element symbol="H" number="1"/>
      </umod:brick>
      <umod:brick title="C" full_name="Carbon" mono_mass="12" avge_mass="12.0107">
         <umod:element symbol="C" number="1"/>
      </umod:brick>
      <umod:brick title="N" full_name="Nitrogen" mono_mass="14.003074" avge_mass="14.0067">
         <umod:element symbol="N" number="1"/>
      </umod:brick>
      <umod:brick title="O" full_name="Oxygen" mono_mass="15.99491463" avge_mass="15.9994">
         <umod:element symbol="O" number="1"/>
      </umod:brick>
      <umod:brick title="P" full_name="Phosphorous" mono_mass="30.973762" avge_mass="30.973761">
         <umod:element symbol="P" number="1"/>
      </umod:brick>
      <umod:brick title="S" full_name="Sulphur" mono_mass="31.9720707" avge_mass="32.065">
         <umod:element symbol="S" number="1"/>
      </umod:brick>
      <umod:brick title="2H" full_name="Deuterium" mono_mass="2.014101779"
                  avge_mass="2.014101779">
         <umod:element symbol="2H" number="1"/>
      </umod:brick>
      <umod:brick title="18O" full_name="Oxygen 18" mono_mass="17.9991603" avge_mass="17.9991603">
         <umod:element symbol="18O" number="1"/>
      </umod:brick>
      <umod:brick title="F" full_name="Fluorine" mono_mass="18.99840322" avge_mass="18.9984032">
         <umod:element symbol="F" number="1"/>
      </umod:brick>
      <umod:brick title="Na" full_name="Sodium" mono_mass="22.9897677" avge_mass="22.98977">
         <umod:element symbol="Na" number="1"/>
      </umod:brick>
      <umod:brick title="Se" full_name="Selenium" mono_mass="79.9165196" avge_mass="78.96">
         <umod:element symbol="Se" number="1"/>
      </umod:brick>
      <umod:brick title="Hex" full_name="Hexose" mono_mass="162.0528235" avge_mass="162.1406">
         <umod:element symbol="H" number="10"/>
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="O" number="5"/>
      </umod:brick>
      <umod:brick title="HexNAc" full_name="N-Acetyl Hexosamine" mono_mass="203.079372605"
                  avge_mass="203.19252">
         <umod:element symbol="C" number="8"/>
         <umod:element symbol="H" number="13"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="5"/>
      </umod:brick>
      <umod:brick title="Ac" full_name="Acetate" mono_mass="42.0105647" avge_mass="42.03668">
         <umod:element symbol="C" number="2"/>
         <umod:element symbol="H" number="2"/>
         <umod:element symbol="O" number="1"/>
      </umod:brick>
      <umod:brick title="dHex" full_name="Deoxy-hexose" mono_mass="146.05790887"
                  avge_mass="146.1412">
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="H" number="10"/>
         <umod:element symbol="O" number="4"/>
      </umod:brick>
      <umod:brick title="HexA" full_name="Hexosamine" mono_mass="176.03208806"
                  avge_mass="176.12412">
         <umod:element symbol="C" number="6"/>
         <umod:element symbol="H" number="8"/>
         <umod:element symbol="O" number="6"/>
      </umod:brick>
      <umod:brick title="Kdn" full_name="3-deoxy-d-glycero-D-galacto-nonulosonic acid"
                  mono_mass="250.06886753"
                  avge_mass="250.20265999999998">
         <umod:element symbol="C" number="9"/>
         <umod:element symbol="H" number="14"/>
         <umod:element symbol="O" number="8"/>
      </umod:brick>
      <umod:brick title="Kdo" full_name="2-keto-3-deoxyoctulosonic acid" mono_mass="220.05830283"
                  avge_mass="220.17668">
         <umod:element symbol="C" number="8"/>
         <umod:element symbol="H" number="12"/>
         <umod:element symbol="O" number="7"/>
      </umod:brick>
      <umod:brick title="Me" full_name="Methyl" mono_mass="14.01565007" avge_mass="14.02658">
         <umod:element symbol="C" number="1"/>
         <umod:element symbol="H" number="2"/>
      </umod:brick>
      <umod:brick title="NeuAc" full_name="N-acetyl neuraminic acid" mono_mass="291.095416635"
                  avge_mass="291.25458000000003">
         <umod:element symbol="C" number="11"/>
         <umod:element symbol="H" number="17"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="8"/>
      </umod:brick>
      <umod:brick title="NeuGc" full_name="N-glycoyl neuraminic acid"
                  mono_mass="307.09033126500003"
                  avge_mass="307.25398">
         <umod:element symbol="C" number="11"/>
         <umod:element symbol="H" number="17"/>
         <umod:element symbol="N" number="1"/>
         <umod:element symbol="O" number="9"/>
      </umod:brick>
      <umod:brick title="Water" full_name="Water" mono_mass="18.0105647" avge_mass="18.01528">
         <umod:element symbol="H" number="2"/>
         <umod:element symbol="O" number="1"/>
      </umod:brick>
      <umod:brick title="Phos" full_name="Phosphate" mono_mass="79.96633092500001"
                  avge_mass="79.979901">
         <umod:element symbol="H" number="1"/>
         <umod:element symbol="P" number="1"/>
         <umod:element symbol="O" number="3"/>
      </umod:brick>
      <umod:brick title="Sulf" full_name="Sulfate" mono_mass="79.95681459000001"
                  avge_mass="80.0632">
         <umod:element symbol="S" number="1"/>
         <umod:element symbol="O" number="3"/>
      </umod:brick>
      <umod:brick title="Pent" full_name="Pentose" mono_mass="132.0422588" avge_mass="132.11462">
         <umod:element symbol="C" number="5"/>
         <umod:element symbol="H" number="8"/>
         <umod:element symbol="O" number="4"/>
      </umod:brick>
      <umod:brick title="Li" full_name="Lithium" mono_mass="7.016003" avge_mass="6.941">
         <umod:element symbol="Li" number="1"/>
      </umod:brick>
      <umod:brick title="13C" full_name="Carbon 13" mono_mass="13.00335483"
                  avge_mass="13.00335483">
         <umod:element symbol="13C" number="1"/>
      </umod:brick>
      <umod:brick title="15N" full_name="Nitrogen 15" mono_mass="15.00010897"
                  avge_mass="15.00010897">
         <umod:element symbol="15N" number="1"/>
      </umod:brick>
      <umod:brick title="Cl" full_name="Chlorine" mono_mass="34.96885272" avge_mass="35.453">
         <umod:element symbol="Cl" number="1"/>
      </umod:brick>
      <umod:brick title="K" full_name="Potassium" mono_mass="38.9637074" avge_mass="39.0983">
         <umod:element symbol="K" number="1"/>
      </umod:brick>
      <umod:brick title="Ca" full_name="Calcium" mono_mass="39.9625906" avge_mass="40.078">
         <umod:element symbol="Ca" number="1"/>
      </umod:brick>
      <umod:brick title="Fe" full_name="Iron" mono_mass="55.9349393" avge_mass="55.845">
         <umod:element symbol="Fe" number="1"/>
      </umod:brick>
      <umod:brick title="Ni" full_name="Nickel" mono_mass="57.9353462" avge_mass="58.6934">
         <umod:element symbol="Ni" number="1"/>
      </umod:brick>
      <umod:brick title="Zn" full_name="Zinc" mono_mass="63.9291448" avge_mass="65.409">
         <umod:element symbol="Zn" number="1"/>
      </umod:brick>
      <umod:brick title="Br" full_name="Bromine" mono_mass="78.9183361" avge_mass="79.904">
         <umod:element symbol="Br" number="1"/>
      </umod:brick>
      <umod:brick title="Ag" full_name="Silver" mono_mass="106.905092" avge_mass="107.8682">
         <umod:element symbol="Ag" number="1"/>
      </umod:brick>
      <umod:brick title="Hg" full_name="Mercury" mono_mass="201.970617" avge_mass="200.59">
         <umod:element symbol="Hg" number="1"/>
      </umod:brick>
      <umod:brick title="Au" full_name="Gold" mono_mass="196.966543" avge_mass="196.96655">
         <umod:element symbol="Au" number="1"/>
      </umod:brick>
      <umod:brick title="I" full_name="Iodine" mono_mass="126.904473" avge_mass="126.90447">
         <umod:element symbol="I" number="1"/>
      </umod:brick>
      <umod:brick title="Mo" full_name="Molybdenum" mono_mass="97.9054073" avge_mass="95.94">
         <umod:element symbol="Mo" number="1"/>
      </umod:brick>
      <umod:brick title="Cu" full_name="Copper" mono_mass="62.9295989" avge_mass="63.546">
         <umod:element symbol="Cu" number="1"/>
      </umod:brick>
      <umod:brick title="Hep" full_name="Heptose" mono_mass="192.06338820000002"
                  avge_mass="192.16658">
         <umod:element symbol="C" number="7"/>
         <umod:element symbol="H" number="12"/>
         <umod:element symbol="O" number="6"/>
      </umod:brick>
      <umod:brick title="B" full_name="Boron" mono_mass="11.0093055" avge_mass="10.811">
         <umod:element symbol="B" number="1"/>
      </umod:brick>
      <umod:brick title="As" full_name="Arsenic" mono_mass="74.9215942" avge_mass="74.9215942">
         <umod:element symbol="As" number="1"/>
      </umod:brick>
   </umod:mod_bricks>
</umod:unimod>