The model contains one compartment called C. There are three species called S1, S2 and S and two parameters called k1 and k2. The model contains one reaction defined as:
Reaction | Rate |
S1 → S2 | C · k2 · S1 |
The model contains one rule which assigns value to species S3:
Type | Variable | Formula |
Assignment | S3 | k1 · S2 · t |
where the symbol 't' denotes the current simulation time.
In this case the initial value for species S3 is inconsistent with the value calculated by the assignmentRule; the calculated value should be used. Note that since this assignmentRule must always remain true, it should be considered during simulation.
The initial conditions are as follows:
Value | Units | |
Initial amount of S1 | 1 | mole |
Initial amount of S2 | 1.5 × 10−15 | mole |
Initial amount of S3 | 1 | mole |
Value of parameter k1 | 0.75 | second-1 |
Value of parameter k2 | 2.5 | 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.