k3 R5 c2 k2 r4 c2 R3 c2 k1 R3 c2 r2 c2 R1 c2 k3 R5 c1 k2 r4 c1 R3 c1 k1 R3 c1 r2 c1 R1 c1 compartment Phi3_c1 1 h1 compartment Phi3_c2 1 h2 compartment Jleak compartment Jleak compartment Vp c1 2 Kp 2 c1 2 compartment Vp c2 2 Kp 2 c2 2 compartment kf p h1 Phi1_c1 Phi1_c1 p Phi_minus1_c1 4 compartment kf p h2 Phi1_c2 Phi1_c2 p Phi_minus1_c2 4 compartment Phi1_c1 Phi2_c1 h1 p Phi1_c1 p Phi_minus1_c1 compartment Phi1_c2 Phi2_c2 h2 p Phi1_c2 p Phi_minus1_c2 compartment D c2 c1