the results indicate that ( a ) the antisera prepared with the described procedure contained significant amounts of antibody against c3 receptors , ( b ) the receptors for c3b and c3d differe in antigenicity , and ( c ) the c3b receptors of tonsil cells , human erythrocytes , granulocytes , and probably glomerular cells have common antigenic sites .
C0020960
antisera
C0003241
antibody