x1 = M
x2 = Mp
x3 = Mpp
x4 = MAPKK
x5 = MKP3
x6 = M_MAPKK
x7 = Mp_MAPKK
x8 = Mpp_MKP3
x9 = Mp_MKP3_dep
x10 = Mp_MKP3
x11 = M_MKP3