x1 = Mdm2
x2 = p53
x3 = Mdm2_p53
x4 = Mdm2_mRNA
x5 = p53_mRNA
x6 = ATMA
x7 = ATMI
x8 = p53_P
x9 = Mdm2_P
x10 = IR
x11 = ROS
x12 = basalROS
x13 = damDNA
x14 = E1
x15 = E2
x16 = E1_Ub
x17 = E2_Ub
x18 = Proteasome
x19 = Ub
x20 = p53DUB
x21 = Mdm2DUB
x22 = DUB
x23 = Mdm2_p53_Ub
x24 = Mdm2_p53_Ub2
x25 = Mdm2_p53_Ub3
x26 = Mdm2_p53_Ub4
x27 = Mdm2_P1_p53_Ub4
x28 = Mdm2_Ub
x29 = Mdm2_Ub2
x30 = Mdm2_Ub3
x31 = Mdm2_Ub4
x32 = Mdm2_P_Ub
x33 = Mdm2_P_Ub2
x34 = Mdm2_P_Ub3
x35 = Mdm2_P_Ub4
x36 = p53_Ub4_Proteasome
x37 = Mdm2_Ub4_Proteasome
x38 = Mdm2_P_Ub4_Proteasome
x39 = GSK3b
x40 = GSK3b_p53
x41 = GSK3b_p53_P
x42 = Abeta
x43 = AggAbeta_Proteasome
x44 = AggAbeta
x45 = AbetaPlaque
x46 = Tau
x47 = Tau_P1
x48 = Tau_P2
x49 = MT_Tau
x50 = AggTau
x51 = AggTau_Proteasome
x52 = Proteasome_Tau
x53 = PP1
x54 = NFT
x55 = ATP
x56 = ADP
x57 = AMP
x58 = Source
x59 = Sink