The model contains one compartment called C. There are three species called S1, S2 and S3 and two parameters called k1 and k2. Species S3 is labeled as an SBML boundary species. The model contains one reaction defined as:
Reaction | Rate |
S1 → S2 | C · k2 · S |
The model contains one rule:
Type | Variable | Formula |
Assignment | S3 | multiply(k1, S1) |
The model contains one functionDefinition defined as:
Id | Arguments | Formula |
multiply | x, y | x · y |
Note that in this case the initial value of the species S3 is not explicitly declared and must be calculated by the AssignmentRule.
The initial conditions are as follows:
Value | Units | |
Initial amount of S1 | 1 | mole |
Initial amount of S2 | 0.5 | mole |
Initial amount of S3 | undeclared | mole |
Value of parameter k1 | 1.5 | dimensionless |
Value of parameter k2 | 5 | second-1 |
Volume of compartment C | 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.