begin name
pfeiffer1
end name

begin reactions
r1 {1.0}$EXTERNAL = {1.0}S
r2 {1.0}S = {10.0}N1
r3 {1.0}S = {1.0}N2
r4 {1.0}N1 = {1.0}$EXTERNAL
r5 {1.0}N2 = {1.0}$EXTERNAL
end reactions

begin rate equations
r1 = v
r2 = (N1[t]*S[t])/(1 + S[t])
r3 = (20*N2[t]*S[t])/(1 + S[t])
r4 = d*N1[t]
r5 = d*N2[t]
end rate equations

begin parameters
d = 1.0
v = 10.0
compartment = 1.0
end parameters

begin initial conditions
N1[0] = N1i
N2[0] = N2i
S[0] = Si
end initial conditions

begin initial values
N1i = 100.0
N2i = 0.0
Si = 0.111111111111111
end initial values

begin assignment rules
end assignment rules

begin function definitions
end function definitions

begin events
unnamed = (t >= 15, {N2[t] -> 0.01}, 0)
end events

begin process annotations
end process annotations

begin species annotations
end species annotations

begin units
end units