e k1 S 1 x1 Keq1 S 1 S K1s x1 K1x1 1 cs S K1s cp x1 K1x1 n cs L 1 S K1s x1 K1x1 1 x3 K1x3 n 1 cs S K1s cp x1 K1x1 K1s 1 S K1s x1 K1x1 1 S K1s x1 K1x1 1 cs S K1s cp x1 K1x1 n L 1 x3 K1x3 n e k2 x1 1 x2 Keq2 x1 K2x1 1 x1 K2x1 x2 K2x2 e k3 x2 1 x3 Keq3 x2 K3x2 1 x2 K3x2 x3 K3x3 V4 1 P Keq4 x3 x3 K4x3 1 P K4P x3 K4x3 1 x3 Ktrx3 ntr 1 ktrscdeg mR ktrnlsyn mR e ktrnldeg