The model contains two compartments named "compartment" and "compartment1". There are four species named S1, S2, S3 and S4 and three parameters named k1, k2 and k3. Compartment "compartment" contains species S1 and S2. Compartment "compartment1" contains species S3 and S4. The model contains three reactions defined as:

Reaction Rate
S1 + S2 → S2 + S2 k1 · S1 · S2 · compartment
S2 → S3 k2 · (S2−S3) · compartment1
S3 + S4 → S4 + S4 k3 · S3 · S4 · compartment

The first reaction occurs entirely within "compartment", the second reaction occurs between a species in "compartment" and a species in "compartment1" and the third reaction occurs entirely within "compartment1".

The initial conditions are as follows:

Value Units
Initial amount of S1 1.0 mole
Initial amount of S2 1.0 mole
Initial amount of S3 0 mole
Initial amount of S4 0.1 mole
Value of parameter k1 0.75 litre mole-1 second-1
Value of parameter k2 7.5 second-1
Value of parameter k3 0.75 litre mole-1 second-1
Volume of compartment "compartment" 1 litre
Volume of compartment "compartment"1 1 litre

The species values are given as amounts of substance to make it easier to use the model in a discrete stochastic simulator, but (as per usual SBML principles) their symbols represent their values in concentration units where they appear in expressions.