x1 = EGF
x2 = R
x3 = Ra
x4 = R2
x5 = RP
x6 = PLCg
x7 = RPLCg
x8 = RPLCgP
x9 = PLCgP
x10 = Grb
x11 = RG
x12 = SOS
x13 = RGS
x14 = GS
x15 = Shc
x16 = RSh
x17 = RShP
x18 = ShP
x19 = RShG
x20 = ShG
x21 = RShGS
x22 = ShGS
x23 = PLCgl