x1 = CRP
x2 = PC
x3 = PC_CRP
x4 = C4
x5 = C4a
x6 = C4b
x7 = C2
x8 = C1
x9 = PC_CRP_C1
x10 = C2a
x11 = C2b
x12 = C4b_C2a
x13 = C3
x14 = C3a
x15 = C3b
x16 = dC3b
x17 = MASP
x18 = dC4b_C2a
x19 = GlcNac
x20 = GlcNac_LF
x21 = LF
x22 = GlcNac_LF_MASP
x23 = PC_CRP_LF
x24 = PC_CRP_LF_MASP
x25 = GlcNac_LF_CRP
x26 = GlcNac_LF_CRP_C1
x27 = C4BP
x28 = C4BP_PC_CRP
x29 = C4BP_GlcNac_LF_CRP
x30 = iC4b_C2a
x31 = C4BP_C4b
x32 = C4b_C2a_C4BP
x33 = dC4b_C2a_C4BP
x34 = PC_CRP_LF_C1
x35 = C4BP_PC_CRP_LF
x36 = GlcNac_LF_CRP_MASP
x37 = PC_CRP_LF_C1_MASP
x38 = GlcNac_LF_C1_MASP
x39 = GlcNac_HF
x40 = HF
x41 = GlcNac_HF_MASP
x42 = X