C
C There are a total of 4 entries in the algebraic variable array.
C There are a total of 4 entries in each of the rate and state variable arrays.
C There are a total of 5 entries in the constant variable array.
C
C
C VOI is time in component environment (second).
C STATES(1) is M in component M (dimensionless).
C STATES(2) is AM in component AM (dimensionless).
C STATES(3) is Mp in component Mp (dimensionless).
C ALGBRC(1) is k1 in component model_parameters (first_order_rate_constant).
C CONSTS(1) is k2 in component model_parameters (first_order_rate_constant).
C CONSTS(2) is k7 in component model_parameters (first_order_rate_constant).
C STATES(4) is AMp in component AMp (dimensionless).
C CONSTS(3) is k3 in component model_parameters (first_order_rate_constant).
C CONSTS(4) is k4 in component model_parameters (first_order_rate_constant).
C CONSTS(5) is k5 in component model_parameters (first_order_rate_constant).
C ALGBRC(4) is k6 in component model_parameters (first_order_rate_constant).
C ALGBRC(2) is phosphorylation in component phosphorylation (dimensionless).
C ALGBRC(3) is stress in component stress (dimensionless).
C RATES(1) is d/dt M in component M (dimensionless).
C RATES(3) is d/dt Mp in component Mp (dimensionless).
C RATES(4) is d/dt AMp in component AMp (dimensionless).
C RATES(2) is d/dt AM in component AM (dimensionless).
C
      SUBROUTINE initConsts(CONSTS, RATES, STATES)
      REAL CONSTS(*), RATES(*), STATES(*)
      STATES(1) = 1.0
      STATES(2) = 0.0
      STATES(3) = 0.0
      CONSTS(1) = 0.5
      CONSTS(2) = 0.01
      STATES(4) = 0.0
      CONSTS(3) = 0.4
      CONSTS(4) = 0.1
      CONSTS(5) = 0.5
      RETURN
      END
      SUBROUTINE computeRates(VOI, CONSTS,  RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = TERNRY(VOI.GE.0.00000.AND.VOI.LT.5.00000, 0.550000, 0.300000)
      RATES(1) = - ( ALGBRC(1)*STATES(1))+ CONSTS(1)*STATES(3)+ CONSTS(2)*STATES(2)
      RATES(3) = ( CONSTS(4)*STATES(4)+ ALGBRC(1)*STATES(1)) -  (CONSTS(1)+CONSTS(3))*STATES(3)
      ALGBRC(4) = ALGBRC(1)
      RATES(4) = ( CONSTS(3)*STATES(3)+ ALGBRC(4)*STATES(2)) -  (CONSTS(5)+CONSTS(4))*STATES(4)
      RATES(2) =  CONSTS(5)*STATES(4) -  (ALGBRC(4)+CONSTS(2))*STATES(2)
      RETURN
      END
      SUBROUTINE computeVariables(VOI, CONSTS, RATES, STATES, ALGBRC)
      REAL VOI, CONSTS(*), RATES(*), STATES(*), ALGBRC(*)
      ALGBRC(1) = TERNRY(VOI.GE.0.00000.AND.VOI.LT.5.00000, 0.550000, 0.300000)
      ALGBRC(4) = ALGBRC(1)
      ALGBRC(2) = STATES(4)+STATES(3)
      ALGBRC(3) = STATES(4)+STATES(2)
      RETURN
      END
      REAL FUNCTION TERNRY(TEST, VALA, VALB)
      LOGICAL TEST
      REAL VALA, VALB
      IF (TEST) THEN
        TERNRY = VALA
      ELSE
        TERNRY = VALB
      ENDIF
      RETURN
      END