$\mathrm{compartment}\mathrm{k1}S$ $\mathrm{compartment}(\mathrm{k1}RS-\mathrm{k2}\mathrm{RS})$ $\mathrm{compartment}\mathrm{k1}\mathrm{RS}$ $\mathrm{compartment}\frac{V\mathrm{Rpp}}{\mathrm{Km}+\mathrm{Rpp}}$