Comparisons of pooled polyclonal rabbit anti-human C3d with four monoclonal mouse anti-human C3ds. II. Quantitation of RBC-bound C3d, and characterization of antiglobulin agglutination reactions against RBC from 27 patients with autoimmune hemolytic anemia.
Labelled polyclonal IgG anti-C3d and monoclonal IgM and IgG anti-C3d antibodies (MAs) were employed at increasing antibody excess to measure the number of C3d molecules on human red blood cells (RBC) coated by complement in vitro and in vivo. Values for the number of C3d sites per cell determined with polyclonal anti-C3d were at least 4-fold higher than… (More)