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<?xml version="1.0"?>
<model xmlns="http://www.cellml.org/cellml/1.1#" name="BidirectionalExample"><component name="BidirectionalExampleComponent"><variable initial_value="10" name="A" units="uM"/><variable initial_value="5" name="B" units="uM"/><variable initial_value="0" name="C" units="uM"/><variable name="J" units="uM_per_s"/><variable initial_value="0.2" name="kf" units="per_uM_per_s"/><variable initial_value="0.05" name="kr" units="per_s"/><math xmlns="http://www.w3.org/1998/Math/MathML"><apply id="flux equation"><eq/><ci>J</ci><apply><minus/><apply><times/><ci>kf</ci><ci>A</ci><ci>B</ci></apply><apply><times/><ci>kr</ci><ci>C</ci></apply></apply></apply><apply id="A ODE"><eq/><apply><diff/><bvar><ci>t</ci></bvar><ci>A</ci></apply><apply><minus/><ci>J</ci></apply></apply><apply id="B ODE"><eq/><apply><diff/><bvar><ci>t</ci></bvar><ci>B</ci></apply><apply><minus/><ci>J</ci></apply></apply><apply id="C ODE"><eq/><apply><diff/><bvar><ci>t</ci></bvar><ci>C</ci></apply><ci>J</ci></apply></math><variable name="t" units="second"/></component><units name="uM"><unit prefix="micro" units="mole"/><unit exponent="-1" units="litre"/></units><units name="per_s"><unit exponent="-1" units="second"/></units><units name="uM_per_s"><unit units="uM"/><unit units="per_s"/></units><units name="per_uM_per_s"><unit exponent="-1" units="uM"/><unit units="per_s"/></units></model>