k1 = k0
k2 = k1
k3 = k2
k4 = k2_prime
k5 = k3
k6 = Yt
k7 = Km3
k8 = k4
k9 = Km4
k10 = k5
k11 = Rt
k12 = Km5
k13 = k6
k14 = Km6
k15 = env
k16 = S