x1 = N
x2 = Na
x3 = Nan
x4 = MF
x5 = F
x6 = Bp
x7 = BN
x8 = A
x9 = K
x10 = B
x11 = MAx
x12 = Rasa
x13 = ERKa
x14 = Xa
x15 = MDusp
x16 = Dusp
x17 = Rasi
x18 = ERKi
x19 = Xi
x20 = Rast
x21 = ERKt
x22 = Xt
x23 = D
x24 = AK
x25 = Kt
x26 = Fgf