FAIRDO BG example 3.7.cellml
Bond graph example: Steady state for an enzyme-catalyzed reaction with multiple reactants and products
A common situation is where multiple reactants participate in an enzyme-catalyzed reaction which has multiple products. For this example, we consider the ‘steady state’ situation in which the amounts of enzyme in the unbound form and the reactant-bound form do not change with time and the enzyme is cycling at a constant rate. Note that this is different from an ‘equilibrium’ situation in which the flux is actually zero.
We also use this example to introduce another symbol which helps simplify the diagrams as they become more complex. Since the capacitive storage term qic for a chemical species i is always associated with its chemical potential uic (defined at a 0:node where mass conservation is ensured), it is useful to combine these into one red outline symbol that contains storage term for the chemical species. The red outline is a reminder that this is also a 0:node for mass conservation.
The reactants qic, for i = 1..I, and products qjc, for j = 1..J, are shown below together with the enzyme qe0c and its bound complex qe1c.
An enzyme-catalyzed reaction with multiple reactants and multiple products.
The Views Available menu to the right provides various options to explore this model here in the Physiome Model Repository. Of particular interest is the Launch with OpenCOR menu item, which will load the simulation experiment shown below directly into the OpenCOR desktop application.
Showing the result of launching the simulation experiment from this exposure in OpenCOR and executing the simulation.