The model contains one compartment called C. There are four species called S1, S2, S3 and S4 and two parameters called k1 and p1. The model contains three reactions defined as:
Reaction | Rate |
(2 * p1)S1 + S2 → S3 | k1 · S1 · S2 · C · s |
S3 → S1 + S2 | k1 · S3 · C · s |
S3 → S1 + S4 | k1 · S3 · C · s |
where the symbol 's' denotes the current simulation time.
Both reactions S3 → S1 + S2 and S3 → S1 + S4 define a local parameters k1 which has a scope local to the defining reaction and are different from each other and the global parameter k1 used in the reaction S1 + S2 → S3.
The initial conditions are as follows:
Value | Units | |
Initial amount of S1 | 2.0 | mole |
Initial amount of S2 | 2.0 | mole |
Initial amount of S3 | 0 | mole |
Initial amount of S4 | 0 | mole |
Value of parameter k1 | 1.0 | litre mole-1 second-2 |
Value of parameter p1 | 1.0 | dimensionless |
Value of local parameter k1 (R2) | 0.9 | second-2 |
Value of local parameter k1 (R3) | 0.7 | second-2 |
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.