$\mathrm{compartment}\mathrm{vin}$ $\mathrm{compartment}\mathrm{kout}X$ $\mathrm{ER}\times 4\mathrm{vM3}\mathrm{k\_CaA}^n\frac{X^n}{(X^n+\mathrm{k\_CaA}^n)(X^n+\mathrm{k\_CaI}^n)}\frac{Z^m}{Z^m+\mathrm{kip3}^m}(Y-X)$ $\frac{\mathrm{compartment}\mathrm{vM2}X^2}{X^2+\mathrm{k2}^2}$ $\mathrm{ER}\mathrm{kf}(Y-X)$ $\frac{\mathrm{compartment}\mathrm{vp}X^2}{X^2+\mathrm{kp}^2}$ $\mathrm{compartment}\mathrm{kdeg}Z$