The model contains one compartment called C. There are four species called S1, S2, S3 and S4 and two parameters called k1 and k2. The model contains two reactions defined as:

Reaction Rate
S1 + S2 → S3 + S4 k1 · S1 · S2 · C
S3 + S4 → S1 + S2 k2 · S3 · S4 · C

The model contains two events that assign values to species S1 and S4:

?(t_c)
Trigger Delay Assignments
Event1 S4 > S2 S1 → 2 × 10−4
Event2 S3 > 2.25 × 10−4 S4 → 1 × 10−4

The initial conditions are as follows:

Value Units
Initial concentration of S1 1.0 × 10−4 mole litre-1
Initial concentration of S2 1.0 × 10−4 mole litre-1
Initial concentration of S3 2.0 × 10−4 mole litre-1
Initial concentration of S4 1.0 × 10−4 mole litre-1
Value of parameter k1 0.75 × 104 litre mole-1 second-1
Value of parameter k2 0.25 × 104 litre mole-1 second-1
Volume of compartment C 0.1 litre