this establishes the close linkage of the daf gene to genes for four other proteins ( c3b/c4b receptor or complement receptor 1 , c3d receptor or complement receptor 2 , factor h , and c4-binding protein ) that share 60-amino-acid homologous repeats as well as complement-regulatory or -receptor activity , thereby enlarging the complement-regulatory gene family on the long arm of human chromosome 1 .
C0009498
complement
C0009499
complement