The human C4b-binding protein beta-chain gene
Human complement component C4b-binding protein (C4BP) is composed of seven alpha-chains and one beta-chain. The alpha- and beta-chains are homologous and both contain multiple copies of short consensus repeats (SCR) and in addition carboxyl-terminal non-repeat regions. Each of the alpha-chains contains a binding site for C4b, whereas the beta-chain binds protein S, a vitamin K-dependent protein in