ASSOCIATION BETWEEN THE ELECTROPHORETICALLY‐DETERMINED C4M HAPLOTYPE PRODUCT AND PARTIAL INHIBITION OF ANTI‐Cha

Abstract
C4[complement component 4]-coated Ch(chido)(a+) red blood cells (RBC) were used as indicator cells in a serum inhibition reaction of anti-Cha, for the determination of the Ch group of serum. This serological study, combined with electrophoretic studies of C4 in a family showed that the C4M haplotype product was associated with partial inhibition of anti-Cha.