The model contains two compartments named compartment and compartment1. There are three species named S1, S3 and S5 and three parameters named k1, k2 and k4. Compartment "compartment" contains species S1. Compartment "compartment"1 contains species S3 and S5. The model contains two reactions defined as:
Reaction | Rate |
S1 → S3 | k1 · S1 · compartment |
S3 → S1 | k2 · (S3−S1) · compartment1 |
Both reactions occur between species within different compartments.
The model contains one rule which assigns value to species S5:
Type | Variable | Formula |
Assignment | S5 | k4 · S3 |
In this case there is no initial value declared for species S3 and thus it must be calculated by the assignmentRule. 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 | 1.0 | mole |
Initial amount of S3 | 0 | mole |
Initial amount of S5 | undeclared | mole |
Value of parameter k1 | 0.75 | second-1 |
Value of parameter k2 | 0.25 | second-1 |
Value of parameter k4 | 0.5 | dimensionless |
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.