Location: Karagiannis, Popel, 2004 @ f36711faffa5 / karagiannis_popel_2004.cellml

Author:
James Lawson <j.lawson@auckland.ac.nz>
Date:
2009-07-23 14:53:39+12:00
Desc:
removed duplicate metadata, updated curation status, removed publication link from documentation
Permanent Source URI:
http://models.cellml.org/workspace/karagiannis_popel_2004/rawfile/f36711faffa59975c275206ce6b495793b232cc8/karagiannis_popel_2004.cellml

<?xml version='1.0' encoding='utf-8'?>
<!--  FILE :  karagiannis_model_2004.xml

CREATED :  10th December 2007

LAST MODIFIED : 10th December 2007

AUTHOR :  Catherine Lloyd
          Bioengineering Institute
          The University of Auckland
          
MODEL STATUS :  This model conforms to the CellML 1.1 Specification.

DESCRIPTION :  This file contains a CellML description of Karagiannis and Popel's 2004 mathematical model of collagen type I proteolysis by matrix metalloproteinase (MMP) 2 and membrane type I MMP during the migration of a tip endothelial cell.

CHANGES:  
  
--><model xmlns="http://www.cellml.org/cellml/1.0#" xmlns:cmeta="http://www.cellml.org/metadata/1.0#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bqs="http://www.cellml.org/bqs/1.0#" xmlns:cellml="http://www.cellml.org/cellml/1.0#" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:vCard="http://www.w3.org/2001/vcard-rdf/3.0#" cmeta:id="karagiannis_model_2004" name="karagiannis_model_2004">

<documentation xmlns="http://cellml.org/tmp-documentation">
<article>
  <articleinfo>
  <title>A theoretical model of type I collagen proteolysis by matrix metalloproteinase (MMP) 2 and membrane type 1 MMP in the presence of tissue inhibitor of metalloproteinase 2</title>
  <author>
    <firstname>Catherine</firstname>
          <surname>Lloyd</surname>
    <affiliation>
      <shortaffil>Bioengineering Institute, University of Auckland</shortaffil>
    </affiliation>
  </author>
</articleinfo>
  <section id="sec_status">
    <title>Model Status</title>
    <para>
        This version of the model has been checked in COR and OpenCell and it runs - possibly replicating the published results.  The model is valid CellML and has consistent units.
    </para>
  </section>
  <sect1 id="sec_structure">
<title>Model Structure</title>

<para>
The formation of new biological vessels requires the coordinated assembly of a proliferating syncytium of endothelial cells (EC) at different developmental stages.  Angiogenesis may also be an essential mechanism of blood vessel remodelling which occurs during a diverse range of physiological processes; including tissue regeneration following injury and new vessel formation during muscle exercise.  It can also occur under pathological conditions such as atherosclerosis and the vascularisation of cancerous tumours.
</para>

<para>
Matrix metalloproteinases (MMPs) are a family of enzymes responsible for the proteolytic processing of extracellular matrix (ECM) structural proteins.  During angiogenesis MMPs are expressed by a single endothelial cell at the tip of the new vessel.  These enzymes manifest a proteolytic activity that allows the cells of the new vessle to penetrate the ECM.  In the mathematical model presented here, Karagiannis and Popel investigate the proteolytic potential of such a tip endothelial cell.  The model authors suggest this model provides a foundation for future quantitative studies of angiogenesis in ECMs of different compositions.  The model is described in more detail in the figure below:
</para>

<para>
The complete original paper reference is cited below:
</para>

<para>
A theoretical model of type I collagen proteolysis by matrix metalloproteinase (MMP) 2 and membrane type 1 MMP in the presence of tissue inhibitor of metalloproteinase 2, Emmanouil D. Karagiannis and Aleksander S. Popel, 2004, <emphasis>The Journal of Biological Chemistry</emphasis>, 279, 39105-39114. <ulink url="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&amp;db=PubMed&amp;list_uids=15252025&amp;dopt=Abstract">PubMed ID: 15252025</ulink> 
</para>


<informalfigure float="0" id="fig_pathway_diagram">
<mediaobject>
  <imageobject>
    <objectinfo>
      <title>model diagram</title>
    </objectinfo>
    <imagedata fileref="karagiannis_2006.png"/>
  </imageobject>
</mediaobject>
<caption>A schematic diagram of the signalling pathway.</caption>
</informalfigure>

</sect1>
</article>
</documentation>

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            <ci> MT1_T2_M2p </ci>
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          <apply><times/>
            <ci> koff_MT1T2M2pMT1 </ci>
            <ci> MT1_T2_M2p_MT1 </ci>
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        </apply>
      </apply>    
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    <variable name="v6" public_interface="out" units="flux"/>
    
    <variable name="MT1_T2_M2p_MT1" public_interface="in" units="molar"/>
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    <math xmlns="http://www.w3.org/1998/Math/MathML" id="6">
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            <ci> MT1_T2_M2p_MT1 </ci>
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        </apply>
      </apply>    
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    <variable name="v7" public_interface="out" units="flux"/>
    
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        <ci> v7 </ci>
        <apply><minus/>
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          <apply><times/>
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            <ci> M2_T2 </ci>
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        </apply>
      </apply>    
    </math>
  </component>

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    <variable name="v8" public_interface="out" units="flux"/>
    
    <variable name="M2_T2" public_interface="in" units="molar"/>
    <variable name="M2_T2_star" public_interface="in" units="molar"/>
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    <math xmlns="http://www.w3.org/1998/Math/MathML" id="8">
      <apply><eq/>
        <ci> v8 </ci>
        <apply><minus/>
          <apply><times/>
            <ci> kiso_M2T2 </ci>
            <ci> M2_T2 </ci>
          </apply>
          <apply><times/>
            <ci> k_iso_M2T2 </ci>
            <ci> M2_T2_star </ci>
          </apply>
        </apply>
      </apply>    
    </math>
  </component>

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    <variable name="v9" public_interface="out" units="flux"/>
    
    <variable name="M2" public_interface="in" units="molar"/>
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    <math xmlns="http://www.w3.org/1998/Math/MathML" id="9">
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        <ci> v9 </ci>
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            <ci> M2_C1 </ci>
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        </apply>
      </apply>    
    </math>
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  <component name="v10">
    <variable name="v10" public_interface="out" units="flux"/>
    
    <variable name="C1" public_interface="in" units="molar"/>  
    <variable name="M2" public_interface="in" units="molar"/>
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            <ci> km_M2C1 </ci>
            <ci> C1 </ci>
          </apply>
        </apply>
      </apply>    
    </math>
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<!--

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            <ci> MT1_C1 </ci>
          </apply>
        </apply>
      </apply>    
    </math>
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-->

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        </apply>
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  <!-- substrates -->
  
  <component name="MT1" cmeta:id="MT1">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
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        <dc:title>MT1</dc:title>
        <dcterms:alternative>MT1-MMP</dcterms:alternative>
        <dcterms:alternative>membrane type I matrix metalloproteinase</dcterms:alternative>  
      </rdf:Description>
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    <variable name="MT1" initial_value="10E-9" public_interface="out" units="molar"/>
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        <dc:title>T2</dc:title>
        <dcterms:alternative>TIMP2</dcterms:alternative>
        <dcterms:alternative>tissue inhibitor of metalloproteinases</dcterms:alternative>  
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        <dc:title>MT1_T2</dc:title>
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        <dc:title>M2p</dc:title>
        <dcterms:alternative>proMMP2</dcterms:alternative>
        <dcterms:alternative>proenzyme diffusible matrix metalloproteinase</dcterms:alternative>  
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          <ci> M2p </ci> 
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  <component name="MT1_T2_M2p" cmeta:id="MT1_T2_M2p">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="MT1_T2_M2p">
        <dc:title>MT1_T2_M2p</dc:title>
        <dcterms:alternative>MT1-MMP-TIMP2-proMMP2</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="MT1_T2_M2p" initial_value="0.0" public_interface="out" units="molar"/>
    <variable name="v4" public_interface="in" units="flux"/> 
    <variable name="v5" public_interface="in" units="flux"/>   
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="20"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> MT1_T2_M2p </ci> 
        </apply>
        <apply><minus/>
          <ci> v5 </ci>
          <ci> v4 </ci>
        </apply> 
      </apply> 
    </math>  
  </component>

  <component name="MT1_T2_M2p_MT1" cmeta:id="MT1_T2_M2p_MT1">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="MT1_T2_M2p_MT1">
        <dc:title>MT1_T2_M2p_MT1</dc:title>
        <dcterms:alternative>MT1-MMP-TIMP2-proMMP2-MT1-MMP</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="MT1_T2_M2p_MT1" initial_value="0.0" public_interface="out" units="molar"/>
    <variable name="v5" public_interface="in" units="flux"/>
    <variable name="v6" public_interface="in" units="flux"/> 
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="21"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> MT1_T2_M2p_MT1 </ci> 
        </apply>
        <apply><minus/>
          <ci> v5 </ci>
          <ci> v6 </ci>
        </apply> 
      </apply> 
    </math>  
  </component>

  <component name="MT1_T2_star" cmeta:id="MT1_T2_star">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="MT1_T2_star">
        <dc:title>MT1_T2_star</dc:title>
        <dcterms:alternative>inactivated MT1-MMP-TIMP2</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="MT1_T2_star" initial_value="0.0" public_interface="out" units="molar"/>
    <variable name="v6" public_interface="in" units="flux"/>  
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="22"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> MT1_T2_star </ci> 
        </apply>
        <apply><minus/>
          <ci> v6 </ci>
        </apply> 
      </apply> 
    </math>  
  </component> 

  <component name="M2" cmeta:id="M2">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="M2">
        <dc:title>M2</dc:title>
        <dcterms:alternative>MMP2</dcterms:alternative>
        <dcterms:alternative>diffusible matrix metalloproteinase</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="M2" initial_value="30E-12" public_interface="out" units="molar"/>
    <variable name="v6" public_interface="in" units="flux"/>
    <variable name="v7" public_interface="in" units="flux"/>
    <variable name="v9" public_interface="in" units="flux"/>
    <variable name="v10" public_interface="in" units="flux"/> 
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="23"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> M2 </ci> 
        </apply>
        <apply><minus/>
          <apply><plus/>
            <ci> v6 </ci>
            <ci> v10 </ci>
          </apply> 
          <apply><plus/>
            <ci> v7 </ci>
            <ci> v9 </ci>
          </apply>
        </apply> 
      </apply> 
    </math>  
  </component>

  <component name="M2_T2" cmeta:id="M2_T2">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="M2_T2">
        <dc:title>M2_T2</dc:title>
        <dcterms:alternative>MMP2-TIMP2</dcterms:alternative>
        <dcterms:alternative>diffusible matrix metalloproteinase-tissue inhibitor of metalloproteinases complex</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="M2_T2" initial_value="0.0" public_interface="out" units="molar"/>
    <variable name="v7" public_interface="in" units="flux"/>
    <variable name="v8" public_interface="in" units="flux"/> 
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="24"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> M2_T2 </ci> 
        </apply>
        <apply><minus/>
          <ci> v7 </ci>
          <ci> v8 </ci>
        </apply> 
      </apply> 
    </math>  
  </component>

  <component name="M2_T2_star" cmeta:id="M2_T2_star">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="M2_T2_star">
        <dc:title>M2_T2_star</dc:title>
        <dcterms:alternative>inactivated MMP2-TIMP2</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="M2_T2_star" initial_value="0.0" public_interface="out" units="molar"/>
    <variable name="v8" public_interface="in" units="flux"/> 
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="25"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> M2_T2_star </ci> 
        </apply>
        <ci> v8 </ci>
      </apply> 
    </math>  
  </component>

  <component name="M2_C1" cmeta:id="M2_C1">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="M2_C1">
        <dc:title>M2_C1</dc:title>
        <dcterms:alternative>MMP2-C1</dcterms:alternative>
        <dcterms:alternative>diffusible matrix metalloproteinase-collagen type I complex</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="M2_C1" initial_value="0.0" public_interface="out" units="molar"/>
    <variable name="v9" public_interface="in" units="flux"/>
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="24"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> M2_C1 </ci> 
        </apply>
        <ci> v9 </ci>
      </apply> 
    </math>  
  </component>

  <component name="C1" cmeta:id="C1">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="C1">
        <dc:title>C1</dc:title>
        <dcterms:alternative>collagen type I</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="C1" initial_value="176E-6" public_interface="out" units="molar"/>
    <variable name="v9" public_interface="in" units="flux"/>
    <variable name="v10" public_interface="in" units="flux"/>
	<variable name="v12" public_interface="in" units="flux"/>  
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="26"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> C1 </ci> 
        </apply>
        <apply><minus/>
          <apply><plus/>
            <ci> v9 </ci>
			<ci> v10 </ci>
            <ci> v12 </ci>
          </apply>
        </apply>  
      </apply> 
    </math>  
  </component>

  <component name="C1D" cmeta:id="C1D">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="C1D">
        <dc:title>C1D</dc:title>
        <dcterms:alternative>denatured collagen type I</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="C1D" initial_value="0.0" public_interface="out" units="molar"/>
    <variable name="v10" public_interface="in" units="flux"/>
    <variable name="v12" public_interface="in" units="flux"/> 
    <variable name="time" public_interface="in" units="second"/>
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="27"> 
      <apply><eq/> 
        <apply><diff/> 
          <bvar><ci> time </ci></bvar> 
          <ci> C1D </ci> 
        </apply>
        <apply><plus/>
          <ci> v10 </ci>
          <ci> v12 </ci>
        </apply>  
      </apply> 
    </math>  
  </component>

<!--

  <component name="MT1_C1" cmeta:id="MT1_C1">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/">
      <rdf:Description rdf:about="MT1_C1">
        <dc:title>MT1_C1</dc:title>
        <dcterms:alternative>MT1-MMP-collagen type I</dcterms:alternative>
      </rdf:Description>
    </rdf:RDF> 
    <variable name="MT1_C1" initial_value="0.0" public_interface="out" units="molar" />
    <variable name="v11" public_interface="in" units="flux" />
    <variable name="v12" public_interface="in" units="flux" /> 
    <variable name="time" public_interface="in" units="second" />
    
    <math xmlns="http://www.w3.org/1998/Math/MathML" id="28" > 
      <apply><eq /> 
        <apply><diff /> 
          <bvar><ci> time </ci></bvar> 
          <ci> MT1_C1 </ci> 
        </apply>
        <apply><minus />
          <ci> v11 </ci>
          <ci> v12 </ci>
        </apply> 
      </apply> 
    </math>  
  </component>

-->
  
  <component name="model_parameters"> 
    <variable name="kon_M2T2" public_interface="out" initial_value="5.9E6" units="second_order_rate_constant"/>
    <variable name="koff_M2T2" public_interface="out" initial_value="6.3" units="first_order_rate_constant"/>
    <variable name="kiso_M2T2" public_interface="out" initial_value="33.0" units="first_order_rate_constant"/>
    <variable name="k_iso_M2T2" public_interface="out" initial_value="2E-8" units="first_order_rate_constant"/>
    <variable name="kon_M2C1" public_interface="out" initial_value="2.6E3" units="second_order_rate_constant"/>
    <variable name="koff_M2C1" public_interface="out" initial_value="2.1E-3" units="first_order_rate_constant"/>
    <variable name="kcat_M2C1" public_interface="out" initial_value="4.5E-3" units="first_order_rate_constant"/>
    <variable name="kact_M2" public_interface="out" initial_value="2E-2" units="first_order_rate_constant"/>
    <variable name="kon_MT1T2M2p" public_interface="out" initial_value="0.14E6" units="second_order_rate_constant"/>
    <variable name="koff_MT1T2M2p" public_interface="out" initial_value="4.7E-3" units="first_order_rate_constant"/>
    <variable name="kon_MT1T2M2pMT1" public_interface="out" initial_value="3E3" units="second_order_rate_constant"/>
    <variable name="koff_MT1T2M2pMT1" public_interface="out" initial_value="0.9E-3" units="first_order_rate_constant"/>
    <variable name="kcat_MT1C1" public_interface="out" initial_value="1.97E-3" units="first_order_rate_constant"/>
    <variable name="kshed_MT1" public_interface="out" initial_value="2.8E3" units="second_order_rate_constant"/>
    <variable name="kon_MT1T2" public_interface="out" initial_value="3.54E6" units="second_order_rate_constant"/>
    <variable name="koff_MT1T2" public_interface="out" initial_value="20.2" units="first_order_rate_constant"/>
	<variable name="km_M2C1" public_interface="out" initial_value="8.5E-6" units="molar"/>
	<variable name="km_MT1C1" public_interface="out" initial_value="8.5E-6" units="molar"/>
  </component>
  
  <connection>
    <map_components component_1="MT1" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="MT1cat" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>
  
  <connection>
    <map_components component_1="MT1t" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="T2" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>
  
  <connection>
    <map_components component_1="MT1_T2" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="M2p" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="MT1_T2_M2p" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>
  
  <connection>
    <map_components component_1="MT1_T2_M2p_MT1" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="MT1_T2_star" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>
  
  <connection>
    <map_components component_1="M2" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="M2_T2" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="M2_T2_star" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>
  
  <connection>
    <map_components component_1="M2_C1" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="C1" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>

  <connection>
    <map_components component_1="C1D" component_2="environment"/>
    <map_variables variable_1="time" variable_2="time"/>
  </connection>
  
  <connection>
    <map_components component_1="v2" component_2="MT1"/>
    <map_variables variable_1="MT1" variable_2="MT1"/>
    <map_variables variable_1="v2" variable_2="v2"/>
  </connection> 

  <connection>
    <map_components component_1="v2" component_2="model_parameters"/>
    <map_variables variable_1="kshed_MT1" variable_2="kshed_MT1"/>
  </connection>

  <connection>
    <map_components component_1="v3" component_2="MT1"/>
    <map_variables variable_1="MT1" variable_2="MT1"/>
    <map_variables variable_1="v3" variable_2="v3"/>
  </connection> 

  <connection>
    <map_components component_1="v3" component_2="T2"/>
    <map_variables variable_1="T2" variable_2="T2"/>
    <map_variables variable_1="v3" variable_2="v3"/>
  </connection>

  <connection>
    <map_components component_1="v3" component_2="MT1_T2"/>
    <map_variables variable_1="MT1_T2" variable_2="MT1_T2"/>
    <map_variables variable_1="v3" variable_2="v3"/>
  </connection>

  <connection>
    <map_components component_1="v3" component_2="model_parameters"/>
    <map_variables variable_1="kon_MT1T2" variable_2="kon_MT1T2"/>
    <map_variables variable_1="koff_MT1T2" variable_2="koff_MT1T2"/>
  </connection>

  <connection>
    <map_components component_1="v4" component_2="M2p"/>
    <map_variables variable_1="M2p" variable_2="M2p"/>
    <map_variables variable_1="v4" variable_2="v4"/>
  </connection> 

  <connection>
    <map_components component_1="v4" component_2="MT1_T2_M2p"/>
    <map_variables variable_1="MT1_T2_M2p" variable_2="MT1_T2_M2p"/>
    <map_variables variable_1="v4" variable_2="v4"/>
  </connection>

  <connection>
    <map_components component_1="v4" component_2="MT1_T2"/>
    <map_variables variable_1="MT1_T2" variable_2="MT1_T2"/>
    <map_variables variable_1="v4" variable_2="v4"/>
  </connection>

  <connection>
    <map_components component_1="v4" component_2="model_parameters"/>
    <map_variables variable_1="kon_MT1T2M2p" variable_2="kon_MT1T2M2p"/>
    <map_variables variable_1="koff_MT1T2M2p" variable_2="koff_MT1T2M2p"/>
  </connection>

  <connection>
    <map_components component_1="v5" component_2="MT1"/>
    <map_variables variable_1="MT1" variable_2="MT1"/>
    <map_variables variable_1="v5" variable_2="v5"/>
  </connection>

  <connection>
    <map_components component_1="v5" component_2="MT1_T2_M2p"/>
    <map_variables variable_1="MT1_T2_M2p" variable_2="MT1_T2_M2p"/>
    <map_variables variable_1="v5" variable_2="v5"/>
  </connection> 

  <connection>
    <map_components component_1="v5" component_2="MT1_T2_M2p_MT1"/>
    <map_variables variable_1="MT1_T2_M2p_MT1" variable_2="MT1_T2_M2p_MT1"/>
    <map_variables variable_1="v5" variable_2="v5"/>
  </connection>

  <connection>
    <map_components component_1="v5" component_2="model_parameters"/>
    <map_variables variable_1="kon_MT1T2M2pMT1" variable_2="kon_MT1T2M2pMT1"/>
    <map_variables variable_1="koff_MT1T2M2pMT1" variable_2="koff_MT1T2M2pMT1"/>
  </connection>

  <connection>
    <map_components component_1="v6" component_2="MT1_T2_M2p_MT1"/>
    <map_variables variable_1="MT1_T2_M2p_MT1" variable_2="MT1_T2_M2p_MT1"/>
    <map_variables variable_1="v6" variable_2="v6"/>
  </connection>

  <connection>
    <map_components component_1="v6" component_2="model_parameters"/>
    <map_variables variable_1="kact_M2" variable_2="kact_M2"/>
  </connection>

  <connection>
    <map_components component_1="v7" component_2="M2"/>
    <map_variables variable_1="M2" variable_2="M2"/>
    <map_variables variable_1="v7" variable_2="v7"/>
  </connection>

  <connection>
    <map_components component_1="v7" component_2="T2"/>
    <map_variables variable_1="T2" variable_2="T2"/>
    <map_variables variable_1="v7" variable_2="v7"/>
  </connection> 

  <connection>
    <map_components component_1="v7" component_2="M2_T2"/>
    <map_variables variable_1="M2_T2" variable_2="M2_T2"/>
    <map_variables variable_1="v7" variable_2="v7"/>
  </connection>

  <connection>
    <map_components component_1="v7" component_2="model_parameters"/>
    <map_variables variable_1="kon_M2T2" variable_2="kon_M2T2"/>
    <map_variables variable_1="koff_M2T2" variable_2="koff_M2T2"/>
  </connection>

  <connection>
    <map_components component_1="v8" component_2="M2_T2"/>
    <map_variables variable_1="M2_T2" variable_2="M2_T2"/>
    <map_variables variable_1="v8" variable_2="v8"/>
  </connection>

  <connection>
    <map_components component_1="v8" component_2="M2_T2_star"/>
    <map_variables variable_1="M2_T2_star" variable_2="M2_T2_star"/>
    <map_variables variable_1="v8" variable_2="v8"/>
  </connection> 

  <connection>
    <map_components component_1="v8" component_2="model_parameters"/>
    <map_variables variable_1="kiso_M2T2" variable_2="kiso_M2T2"/>
    <map_variables variable_1="k_iso_M2T2" variable_2="k_iso_M2T2"/>
  </connection>

  <connection>
    <map_components component_1="v9" component_2="M2"/>
    <map_variables variable_1="M2" variable_2="M2"/>
    <map_variables variable_1="v9" variable_2="v9"/>
  </connection>

  <connection>
    <map_components component_1="v9" component_2="C1"/>
    <map_variables variable_1="C1" variable_2="C1"/>
    <map_variables variable_1="v9" variable_2="v9"/>
  </connection> 

  <connection>
    <map_components component_1="v9" component_2="M2_C1"/>
    <map_variables variable_1="M2_C1" variable_2="M2_C1"/>
    <map_variables variable_1="v9" variable_2="v9"/>
  </connection>

  <connection>
    <map_components component_1="v9" component_2="model_parameters"/>
    <map_variables variable_1="kon_M2C1" variable_2="kon_M2C1"/>
    <map_variables variable_1="koff_M2C1" variable_2="koff_M2C1"/>
  </connection>

  <connection>
    <map_components component_1="v10" component_2="M2"/>
    <map_variables variable_1="M2" variable_2="M2"/>
    <map_variables variable_1="v10" variable_2="v10"/>
  </connection>
  
  <connection>
    <map_components component_1="v10" component_2="C1"/>
    <map_variables variable_1="C1" variable_2="C1"/>
    <map_variables variable_1="v10" variable_2="v10"/>
  </connection>

  <connection>
    <map_components component_1="v10" component_2="model_parameters"/>
    <map_variables variable_1="km_M2C1" variable_2="km_M2C1"/>
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            A theoretical model of type I collagen proteolysis by matrix metalloproteinase (MMP) 2 and membrane type 1 MMP in the presence of tissue inhibitor of metalloproteinase 2
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        Karagiannis and Popel's 2004 mathematical model of collagen type I proteolysis by matrix metalloproteinase (MMP) 2 and membrane type I MMP during the migration of a tip endothelial cell.
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