The model contains one compartment called "compartment". There are four species named S1, S2, S3 and S4 and four parameters named k1, k2, k3 and k4. Species S3 is labeled a SBML boundary condition and is also labeled constant. The model contains four reactions defined as:
Reaction | Rate |
S1 → S2 | k1 · S1 · compartment |
S2 → S1 | k2 · S2 · compartment |
S2 → S3 + S4 | k3 · S2 · compartment |
S3 + S4 → S2 | k4 · S3 · S4 · compartment |
The initial conditions are as follows:
Value | Units | |
Initial amount of S1 | 1.0 × 10−4 | mole |
Initial amount of S2 | 2.0 × 10−4 | mole |
Initial amount of S3 | 0 | mole |
Initial amount of S4 | 0 | mole |
Value of parameter k1 | 0.75 | second-1 |
Value of parameter k2 | 0.25 | second-1 |
Value of parameter k3 | 0.4 | second-1 |
Value of parameter k4 | 0.1 | litre mole-1 second-1 |
Volume of compartment "compartment" | 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.
Note: The test data for this model was generated from an analytical solution of the system of equations.