C
C There are a total of 5 entries in the algebraic variable array.
C There are a total of 2 entries in each of the rate and state variable arrays.
C There are a total of 12 entries in the constant variable array.
C
C
C VOI is time in component environment (second).
C ALGBRC(1) is H_int in component concentrations (mM).
C ALGBRC(2) is H_ext in component concentrations (mM).
C CONSTS(1) is psi_int in component concentrations (volt).
C CONSTS(2) is psi_ext in component concentrations (volt).
C CONSTS(10) is psi in component concentrations (volt).
C STATES(1) is pH_int in component concentrations (dimensionless).
C STATES(2) is pH_ext in component concentrations (dimensionless).
C CONSTS(3) is J_Vtype_H_Max in component H_ATPase (mM_per_s).
C ALGBRC(4) is J_Vtype_H in component H_ATPase (mM_per_s).
C ALGBRC(5) is plot in component fluxes (dimensionless).
C ALGBRC(3) is mu_H in component H_ATPase (joule_per_mmole).
C CONSTS(4) is mu_0 in component H_ATPase (joule_per_mmole).
C CONSTS(5) is xi in component H_ATPase (mmole_per_joule).
C CONSTS(6) is F in component H_ATPase (coulomb_per_mmole).
C CONSTS(7) is R in component H_ATPase (joule_per_mmole_kelvin).
C CONSTS(8) is T in component H_ATPase (kelvin).
C CONSTS(9) is z in component H_ATPase (dimensionless).
C RATES(1) is d/dt pH_int in component concentrations (dimensionless).
C RATES(2) is d/dt pH_ext in component concentrations (dimensionless).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      CONSTS(1) = -0.03
      CONSTS(2) = 0.0
      STATES(1) = 7.5
      STATES(2) = 4.0
      CONSTS(3) = 1.8
      CONSTS(4) = 4.0
      CONSTS(5) = 0.4
      CONSTS(6) = 96.5
      CONSTS(7) = 0.008315
      CONSTS(8) = 300
      CONSTS(9) = -1.57
      CONSTS(10) = CONSTS(2) - CONSTS(1)
      CONSTS(10) = 0.00000
      CONSTS(11) = 0.100000
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      RATES(1) = CONSTS(10)
      RATES(2) = CONSTS(11)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) =  1000.00*10.0000 ** - STATES(1)
      ALGBRC(2) =  1000.00*10.0000 ** - STATES(2)
      ALGBRC(3) =  CONSTS(7)*CONSTS(8)*log(ALGBRC(2)/ALGBRC(1))+ CONSTS(9)*CONSTS(6)*CONSTS(10)
      ALGBRC(4) = CONSTS(3)/(1.00000+EXP( CONSTS(5)*(ALGBRC(3) - CONSTS(4))))
      ALGBRC(5) = ALGBRC(4)/CONSTS(3)
      RETURN
      END