k1 = k0 k2 = k1 k3 = k2 k4 = k2_prime k5 = k3 k6 = J3 k7 = k4 k8 = J4 k9 = k5 k10 = k6 k11 = Et k12 = Km3 k13 = Km4 k14 = env k15 = S