The model contains one compartment called "compartment". There are three species named S1, S2 and S3 and two parameters named k1 and k2. The model contains two reactions defined as:

Reaction Rate
S1 + S2 → S3 k1 · S1 · S2 · compartment
S3 → S1 + S2 k2 · S3 · compartment

The model contains one rule which assigns value to compartment "compartment":

Type Variable Formula
Assignment compartment 1

In this case there is no initial value declared for compartment "compartment". Thus the value must be calculated by the assignmentRule.

The initial conditions are as follows:

Value Units
Initial amount of S1 1 × 10−5 mole
Initial amount of S2 1.5 × 10−5 mole
Initial amount of S3 1 × 10−5 mole
Value of parameter k1 1.5 × 105 litre mole-1 second-1
Value of parameter k2 50 second-1
Volume of compartment "compartment" undeclared 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.