Percent of phagocytosis for human E opsonized with different inputs of an MoAb specific for glycophorin versus phagocytosis of E opsonized with anti-CR1 MoAbs. After opsonization with antiglycophorin or antiCR1 MoAbs, the E were then reacted with rabbit antimouse IgG. The multiple bars are representative of the same experiment performed on 3 different days.