<ForceField>
  <Info>
    <DateGenerated>2018-08-11</DateGenerated>
    <Source Source="toppar/stream/prot/toppar_all36_prot_model.str" md5hash="fdbe7bf14d2f08b48f7df4508bcc3d11" sourcePackage="charmm36" sourcePackageVersion="toppar_c36_aug15.tgz">toppar/stream/prot/toppar_all36_prot_model.str</Source>
    <Reference Reference="&gt;&gt; All-hydrogen topology for small model compounds used in the &lt;&lt; &gt;&gt; development of the CHARMM22 protein all-hydrogen parameters &lt;&lt; MacKerell, Jr., A. D.; Bashford, D.; Bellott, M.; Dunbrack Jr., R.L.; Evanseck, J.D.; Field, M.J.; Fischer, S.; Gao, J.; Guo, H.; Ha, S.; Joseph-McCarthy, D.; Kuchnir, L.; Kuczera, K.; Lau, F.T.K.; Mattos, C.; Michnick, S.; Ngo, T.; Nguyen, D.T.; Prodhom, B.; Reiher, III, W.E.; Roux, B.; Schlenkrich, M.; Smith, J.C.; Stote, R.; Straub, J.; Watanabe, M.; Wiorkiewicz-Kuczera, J.; Yin, D.; Karplus, M.  All-atom empirical potential for molecular modeling and dynamics Studies of proteins.  Journal of Physical Chemistry B, 1998, 102, 3586-3616" forcefield="protein">&gt;&gt; All-hydrogen topology for small model compounds used in the &lt;&lt; &gt;&gt; development of the CHARMM22 protein all-hydrogen parameters &lt;&lt; MacKerell, Jr., A. D.; Bashford, D.; Bellott, M.; Dunbrack Jr., R.L.; Evanseck, J.D.; Field, M.J.; Fischer, S.; Gao, J.; Guo, H.; Ha, S.; Joseph-McCarthy, D.; Kuchnir, L.; Kuczera, K.; Lau, F.T.K.; Mattos, C.; Michnick, S.; Ngo, T.; Nguyen, D.T.; Prodhom, B.; Reiher, III, W.E.; Roux, B.; Schlenkrich, M.; Smith, J.C.; Stote, R.; Straub, J.; Watanabe, M.; Wiorkiewicz-Kuczera, J.; Yin, D.; Karplus, M.  All-atom empirical potential for molecular modeling and dynamics Studies of proteins.  Journal of Physical Chemistry B, 1998, 102, 3586-3616</Reference>
  </Info>
  <AtomTypes>
    <Type class="C3" element="C" mass="12.011" name="C3"/>
  </AtomTypes>
  <HarmonicBondForce>
    <Bond k="263173.6" length="0.12940000000000002" type1="OC" type2="CD"/>
    <Bond k="200831.99999999997" length="0.1501" type1="C3" type2="C3"/>
    <Bond k="284511.99999999994" length="0.10830000000000001" type1="C3" type2="HB2"/>
  </HarmonicBondForce>
  <HarmonicAngleForce>
    <Angle angle="2.0943951023931953" k="334.72" type1="OC" type2="CD" type3="OC"/>
    <Angle angle="1.9373154697137058" k="647.2647999999999" type1="C3" type2="C3" type3="C3"/>
    <Angle angle="2.0437805540853597" k="192.464" type1="C3" type2="C3" type3="HB2"/>
    <Angle angle="2.0420352248333655" k="192.464" type1="HB2" type2="C3" type3="HB2"/>
    <Angle angle="1.8849555921538759" k="435.136" type1="CC" type2="CT1" type3="CC"/>
    <Angle angle="1.911135530933791" k="276.144" type1="HA1" type2="CT1" type3="CC"/>
    <Angle angle="1.980948701013564" k="488.2728" type1="CT1" type2="CT2A" type3="CT1"/>
    <Angle angle="1.9216075064457567" k="288.696" type1="HA1" type2="CT1" type3="CT2A"/>
    <Angle angle="1.8849555921538759" k="435.136" type1="CC" type2="CT1" type3="CD"/>
  </HarmonicAngleForce>
  <!--Urey-Bradley terms-->
  <AmoebaUreyBradleyForce>
    <UreyBradley d="0.22412700000000002" k="41630.8" type1="OC" type2="CD" type3="OC"/>
    <UreyBradley d="0.2561" k="3347.2000000000003" type1="C3" type2="C3" type3="C3"/>
    <UreyBradley d="0.21789999999999998" k="9426.552000000001" type1="C3" type2="C3" type3="HB2"/>
    <UreyBradley d="0.21789999999999998" k="9426.552000000001" type1="HB2" type2="C3" type3="C3"/>
    <UreyBradley d="0.18020000000000003" k="2259.36" type1="HB2" type2="C3" type3="HB2"/>
    <UreyBradley d="0.2163" k="12552.000000000002" type1="HA1" type2="CT1" type3="CC"/>
    <UreyBradley d="0.2163" k="12552.000000000002" type1="CC" type2="CT1" type3="HA1"/>
    <UreyBradley d="0.2561" k="4669.344" type1="CT1" type2="CT2A" type3="CT1"/>
    <UreyBradley d="0.21789999999999998" k="9426.552000000001" type1="HA1" type2="CT1" type3="CT2A"/>
    <UreyBradley d="0.21789999999999998" k="9426.552000000001" type1="CT2A" type2="CT1" type3="HA1"/>
  </AmoebaUreyBradleyForce>
  <PeriodicTorsionForce>
    <Proper k1="0.41840000000000005" periodicity1="6" phase1="0.0" type1="C3" type2="C3" type3="C3" type4="HB2"/>
    <Proper k1="0.8368000000000001" periodicity1="5" phase1="3.141592653589793" type1="HB2" type2="C3" type3="C3" type4="HB2"/>
    <Proper k1="1.00416" k2="1.5480800000000001" periodicity1="1" periodicity2="3" phase1="3.141592653589793" phase2="0.0" type1="CT3" type2="S" type3="CT2" type4="CT1"/>
    <Proper k1="0.79496" periodicity1="3" phase1="0.0" type1="CT1" type2="CT2A" type3="CT1" type4="NH3"/>
    <Proper k1="0.8368000000000001" periodicity1="3" phase1="0.0" type1="HA1" type2="CT1" type3="CT2A" type4="CT1"/>
    <Proper k1="0.8368000000000001" periodicity1="3" phase1="0.0" type1="CC" type2="CT1" type3="CT2A" type4="CT1"/>
    <Proper k1="0.8368000000000001" periodicity1="3" phase1="0.0" type1="CD" type2="CT1" type3="CT2A" type4="CT1"/>
    <Proper k1="0.8368000000000001" periodicity1="3" phase1="0.0" type1="HB1" type2="CT1" type3="CT2A" type4="CT1"/>
    <Proper k1="0.8368000000000001" periodicity1="3" phase1="0.0" type1="HA1" type2="CT1" type3="CT2A" type4="HA2"/>
    <Proper k1="0.46024000000000004" k2="4.10032" k3="6.694400000000001" periodicity1="1" periodicity2="2" periodicity3="3" phase1="0.0" phase2="3.141592653589793" phase3="3.141592653589793" type1="C" type2="CT1" type3="CT2A" type4="CT1"/>
    <Proper k1="3.6819200000000003" k2="0.0" k3="7.9496" periodicity1="1" periodicity2="2" periodicity3="3" phase1="3.141592653589793" phase2="3.141592653589793" phase3="0.0" type1="CT1" type2="CT2A" type3="CT1" type4="NH1"/>
  </PeriodicTorsionForce>
  <NonbondedForce coulomb14scale="1.0" lj14scale="1.0">
    <UseAttributeFromResidue name="charge"/>
    <Atom epsilon="0.0" sigma="1.0" type="C3"/>
  </NonbondedForce>
  <LennardJonesForce lj14scale="1.0">
    <Atom epsilon="0.08368" sigma="0.4053589167538544" type="C3"/>
  </LennardJonesForce>
</ForceField>
