begin name
bier2
end name

begin reactions
vG1toT1 {1.0}G1 = {2.0}T1
vG2toT2 {1.0}G2 = {2.0}T2
vIn {1.0}$EXTERNAL = {1.0}G1 + {1.0}G2
vOut1T1 {1.0}T1 = {1.0}$EXTERNAL
vOut1T2 {1.0}T2 = {1.0}$EXTERNAL
vT2toT1 {1.0}T2 = {1.0}T1
end reactions

begin rate equations
vG1toT1 = k1*G1[t]*T1[t]
vG2toT2 = k1*G2[t]*T2[t]
vIn = Vin
vOut1T1 = (kp*T1[t])/(km + T1[t])
vOut1T2 = (kp*T2[t])/(km + T2[t])
vT2toT1 = epsilon*(-T1[t] + T2[t])
end rate equations

begin parameters
Vin = 0.36
epsilon = 0.01
k1 = 0.02
km = 13.0
kp = 6.0
compartment = 1.0
end parameters

begin initial conditions
G1[0] = G1i
G2[0] = G2i
T1[0] = T1i
T2[0] = T2i
end initial conditions

begin initial values
G1i = 6.6
G2i = 10.3
T1i = 7.6
T2i = 0.41
end initial values

begin assignment rules
Tsum := T1[t] + T2[t]
Tdiff := -T1[t] + T2[t]
end assignment rules

begin function definitions
end function definitions

begin events
end events

begin process annotations
end process annotations

begin species annotations
end species annotations

begin units
end units