x1 = alpha
x2 = Ste2
x3 = Ste2a
x4 = Gabc
x5 = GaGTP
x6 = Gbc
x7 = GaGDP
x8 = complexC
x9 = complexD
x10 = Ste5
x11 = Ste11
x12 = complexA
x13 = Ste7
x14 = Fus3
x15 = complexB
x16 = Ste20
x17 = complexE
x18 = complexF
x19 = complexG
x20 = complexH
x21 = complexI
x22 = complexL
x23 = Fus3PP
x24 = complexK
x25 = Ste12
x26 = Ste12a
x27 = Bar1
x28 = Bar1a
x29 = Bar1aex
x30 = Far1
x31 = Far1PP
x32 = Far1U
x33 = complexM
x34 = complexN
x35 = Cdc28
x36 = Sst2
x37 = p