<ForceField>
  <Info>
    <DateGenerated>2019-11-29</DateGenerated>
    <Source Source="leaprc.phosaa10" md5hash="99ff5cc879e5461e52852acbb7b6e312" sourcePackage="AmberTools" sourcePackageVersion="19.9">leaprc.phosaa10</Source>
    <Reference>Homeyer N., Horn A. H. C., Lanig H., Sticht H. (2006). MBER force-field parameters for phosphorylated amino acids in different protonation states: phosphoserine, phosphothreonine, phosphotyrosine, and phosphohistidine. J. Mol. Model. 12, 281. Steinbrecher, T., Latzer, J., and Case, D.A. (2012). Revised AMBER parameters for bioorganic phosphates. J. Chem. Theory Comput. 8, 4405-4412.</Reference>
  </Info>
  <AtomTypes>
    <Type element="O" name="OP" class="OP" mass="16.0"/>
    <Type element="O" name="OQ" class="OQ" mass="16.0"/>
    <Type element="O" name="OR" class="OR" mass="16.0"/>
    <Type element="O" name="OT" class="OT" mass="16.0"/>
    <Type element="O" name="OV" class="OV" mass="16.0"/>
    <Type element="O" name="OX" class="OX" mass="16.0"/>
    <Type element="O" name="OZ" class="OZ" mass="16.0"/>
  </AtomTypes>
  <Residues>
    <Residue name="PTR">
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      <Atom name="HA" type="H1" charge="0.027982"/>
      <Atom name="CB" type="CT" charge="-0.251171"/>
      <Atom name="HB2" type="HC" charge="0.08193"/>
      <Atom name="HB3" type="HC" charge="0.08193"/>
      <Atom name="CG" type="CA" charge="0.073446"/>
      <Atom name="CD1" type="CA" charge="-0.198084"/>
      <Atom name="HD1" type="HA" charge="0.112503"/>
      <Atom name="CE1" type="CA" charge="-0.254266"/>
      <Atom name="HE1" type="HA" charge="0.161606"/>
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      <Atom name="C" type="C" charge="0.5366"/>
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      <Bond atomName1="CB" atomName2="HB2"/>
      <Bond atomName1="CB" atomName2="HB3"/>
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    <Residue name="SEP">
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      <Bond atomName1="CA" atomName2="CB"/>
      <Bond atomName1="CB" atomName2="HB"/>
      <Bond atomName1="CB" atomName2="OG1"/>
      <Bond atomName1="CB" atomName2="CG2"/>
      <Bond atomName1="CG2" atomName2="HG21"/>
      <Bond atomName1="CG2" atomName2="HG22"/>
      <Bond atomName1="CG2" atomName2="HG23"/>
      <Bond atomName1="OG1" atomName2="P"/>
      <Bond atomName1="P" atomName2="O3P"/>
      <Bond atomName1="P" atomName2="O2P"/>
      <Bond atomName1="P" atomName2="O1P"/>
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      <Bond atomName1="C" atomName2="O"/>
      <ExternalBond atomName="N"/>
      <ExternalBond atomName="C"/>
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    <Residue name="TPO">
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    <Residue name="Y1P">
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  </Residues>
  <HarmonicBondForce>
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    <Proper type1="" type2="OR" type3="P" type4="" periodicity1="3" phase1="0.0" k1="1.046"/>
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    <Proper type1="" type2="OZ" type3="P" type4="" periodicity1="3" phase1="0.0" k1="1.046"/>
    <Proper type1="" type2="C" type3="OZ" type4="" periodicity1="2" phase1="3.141592653589793" k1="11.296800000000001"/>
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    <UseAttributeFromResidue name="charge"/>
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    <Atom type="OX" sigma="0.3278685462500077" epsilon="0.87864"/>
    <Atom type="OZ" sigma="0.33187759048163923" epsilon="0.7112800000000001"/>
  </NonbondedForce>
</ForceField>
