x1 = TNFR_E
x2 = TNF_E
x3 = TNF_TNFR_E
x4 = TNFR
x5 = RIP
x6 = TRADD
x7 = TRAF2
x8 = FADD
x9 = TNF_TNFR_TRADD
x10 = TNFRC1
x11 = TNFRCint1
x12 = TNFRCint2
x13 = TNFRCint3
x14 = TNFRC2
x15 = FLIP
x16 = TNFRC2_FLIP
x17 = TNFRC2_pCasp8
x18 = TNFRC2_FLIP_FLIP
x19 = TNFRC2_pCasp8_pCasp8
x20 = TNFRC2_FLIP_pCasp8
x21 = TNFRC2_FLIP_pCasp8_RIP_TRAF2
x22 = IKK
x23 = IKKa
x24 = A20
x25 = NFkB
x26 = IkBa
x27 = IkBa_NFkB
x28 = PIkBa
x29 = NFkB_N
x30 = IkBa_N
x31 = IkBa_NFkB_N
x32 = A20_mRNA
x33 = IkBa_mRNA
x34 = XIAP_mRNA
x35 = FLIP_mRNA
x36 = BAR
x37 = XIAP
x38 = pCasp8
x39 = pCasp3
x40 = pCasp6
x41 = Casp8
x42 = Casp3
x43 = Casp6
x44 = BAR_Casp8
x45 = XIAP_Casp3
x46 = PARP
x47 = cPARP