Rendering of the source text

<?xml version='1.0'?>
<!-- This CellML file was generated from:
 Weinstein, Alan M. "A mathematical model of the outer medullary collecting duct of the rat." American Journal of Physiology-Renal Physiology 279.1 (2000): F24-F45.
 The results are compared with Figure 6 in:
 Chang, Hangil, and Toshiro Fujita. "A numerical model of acid-base transport in rat distal tubule." American Journal of Physiology-Renal Physiology 281.2 (2001): F222-F243.-->
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    <import xlink:href="Units/Units.cellml">
        <units name="mM" units_ref="mM"/>
        <units name="mM_per_s" units_ref="mM_per_s"/>
    </import>
    <import xlink:href="Weinstein_2000_HATPase.cellml">
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        <variable name="time" public_interface="out" units="second"/>
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        <variable name="time" public_interface="in" units="second"/>
        <variable name="H_int" public_interface="out" units="mM"/>
        <variable name="H_ext" public_interface="out" units="mM"/>
        <variable initial_value="-0.03" name="psi_int" units="volt"/>
        <variable initial_value="0.0" name="psi_ext" units="volt"/>
        <variable name="psi" public_interface="out" units="volt"/>
        <variable initial_value="7.5" name="pH_int" units="dimensionless"/>
        <variable initial_value="4.0" name="pH_ext" units="dimensionless"/>
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                <eq/>
                <ci>H_int</ci>
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                    <times/>
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                    <apply>
                        <power/>
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    <component name="fluxes">
        <variable name="J_Vtype_H_Max" public_interface="in" units="mM_per_s"/>
        <variable name="J_Vtype_H" public_interface="in" units="mM_per_s"/>
        <variable name="plot" units="dimensionless"/>
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        <map_variables variable_1="H_ext" variable_2="H_ext"/>
        <map_variables variable_1="psi" variable_2="psi"/>
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