x1 = Cdc25
x2 = Cdc25_phosphorylated
x3 = Cyclin_Cdk1_MPF
x4 = Cyclin_Cdk1_preMPF
x5 = Wee1
x6 = Wee1_phosphorylated
x7 = Cyclin
x8 = Cdk1
x9 = IE
x10 = IE_phosphorylated
x11 = APC_active
x12 = Cdk1_total
x13 = Cdc25_total
x14 = Wee1_total
x15 = IE_total
x16 = APC_total
x17 = ppase
x18 = Cyclin_total