x1 = A_b
x2 = O_b
x3 = P_b
x4 = L_b
x5 = S_b
x6 = NAPE_b
x7 = NOPE_b
x8 = NPPE_b
x9 = NLPE_b
x10 = NSPE_b
x11 = FAAH_b
x12 = FAAHinh_b
x13 = A_r
x14 = O_r
x15 = P_r
x16 = L_r
x17 = S_r
x18 = NAPE_r
x19 = NOPE_r
x20 = NPPE_r
x21 = NLPE_r
x22 = NSPE_r
x23 = FAAH_r
x24 = FAAHinh_r
x25 = A_m
x26 = O_m
x27 = P_m
x28 = L_m
x29 = S_m
x30 = FAAH_m
x31 = FAAHinh_m
x32 = A_p
x33 = O_p
x34 = P_p
x35 = L_p
x36 = S_p
x37 = PFM_gut
x38 = PFM_p
x39 = PFM_r