def model individual_pH_B2 as
 def import using "units_and_constants/units_BG.cellml" for
        unit mM using unit mM;
unit fmol using unit fmol;
unit per_fmol using unit per_fmol;
        unit J_per_mol using unit J_per_mol;
unit fmol_per_sec using unit fmol_per_sec;
        unit C_per_mol using unit C_per_mol;
  unit J_per_C using unit J_per_C;
        unit microm3 using unit microm3;
  unit fF using unit fF;
        unit fC using unit fC;
  unit fA using unit fA;
        unit per_second using unit per_second;
  unit millivolt using unit millivolt;
        unit per_sec using unit per_sec;
  unit J_per_K_per_mol using unit J_per_K_per_mol;
        unit fmol_per_L using unit fmol_per_L;
  unit fmol_per_L_per_sec using unit fmol_per_L_per_sec;
        unit per_sec_per_fmol_per_L using unit per_sec_per_fmol_per_L;
  unit uM using unit uM;
        unit mM_per_sec using unit mM_per_sec;
  unit uM_per_sec using unit uM_per_sec;
        unit pL using unit pL;
  unit m_to_u using unit m_to_u;
 enddef;
def import using "units_and_constants/constants_BG.cellml" for
            comp constants using comp constants;
enddef;

    def comp environment as
    var time: second {pub: out};
    // initial values
var q_H_i: fmol {init: 1e-888, pub: out};
var q_B2: fmol {init: 1e-888, pub: out};
var q_HB2: fmol {init: 1e-888, pub: out};
// From submodule
var v_Re_B2: fmol_per_sec {pub: in};
ode(q_H_i, time) = vvv;
ode(q_B2, time) = vvv;
ode(q_HB2, time) = vvv;
enddef;

def comp pH_B2_parameters as
var kappa_Re_B2: fmol_per_sec {init: 3.7325, pub: out};
var K_H_i: per_fmol {init: 13.6212, pub: out};
var K_B2: per_fmol {init: 13.6212, pub: out};
var K_HB2: per_fmol {init: 0.000189765, pub: out};
enddef;
def comp pH_B2 as
        var time: second {pub: in};
        var R: J_per_K_per_mol {pub: in};
        var T: kelvin {pub: in};
        // parameters
var kappa_Re_B2: fmol_per_sec {pub: in};
var K_H_i: per_fmol {pub: in};
var K_B2: per_fmol {pub: in};
var K_HB2: per_fmol {pub: in};
// Input from global environment
var q_H_i: fmol {pub: in};
var q_B2: fmol {pub: in};
var q_HB2: fmol {pub: in};
// Constitutive parameters
var mu_H_i: J_per_mol;
var mu_B2: J_per_mol;
var mu_HB2: J_per_mol;
var v_Re_B2: fmol_per_sec {pub: out};
mu_H_i = R*T*ln(K_H_i*q_H_i);
mu_B2 = R*T*ln(K_B2*q_B2);
mu_HB2 = R*T*ln(K_HB2*q_HB2);
v_Re_B2 = ppp;
enddef;
def map between environment and pH_B2 for
vars time and time;
vars q_H_i and q_H_i;
vars q_B2 and q_B2;
vars q_HB2 and q_HB2;
vars v_Re_B2 and v_Re_B2;
enddef;
def map between pH_B2 and pH_B2_parameters for
vars kappa_Re_B2 and kappa_Re_B2;
vars K_H_i and K_H_i;
vars K_B2 and K_B2;
vars K_HB2 and K_HB2;
enddef;
def map between constants and pH_B2 for
vars R and R;
 vars T and T;
enddef;
enddef;