$\mathrm{CYTOPLASM}\frac{\mathrm{k1}P\frac{2}{1+(1+8\mathrm{Keq}P)^{0.5}}+\mathrm{k2}P}{J+P}$ $DP\mathrm{CYTOPLASM}$ $\mathrm{CYTOPLASM}\frac{\mathrm{Vm}}{1+\left(\frac{P(1-\frac{2}{1+(1+8\mathrm{Keq}P)^{0.5}})}{2\mathrm{Pcrit}}\right)^2}$ $VM\mathrm{CYTOPLASM}$ $DM\mathrm{CYTOPLASM}$