k1 = compartment
k2 = __lp_r2_V0
k3 = __lp_r3_kcat2
k4 = __lp_r3_KmCYS
k5 = __lp_r3_KmPHSER
k6 = __lp_r3_Ki2
k7 = __lp_r4_Ki3
k8 = Thr
k9 = Cystathionine
k10 = Hser
k11 = Phi
k12 = Cys