x1 = H2_HMPt
x2 = ATP
x3 = H2_HMPterinPP
x4 = AMP
x5 = p_ABA
x6 = PPi
x7 = H2_Pteroate
x8 = L_Glutamate
x9 = Phosphate
x10 = ADP
x11 = DHF
x12 = L_serine
x13 = Glycine
x14 = NADP
x15 = NADPH
x16 = THF
x17 = CH2_THF