Binding of the receptors for IgE by various lectins

Two receptors for IgE, having apparent molecular weights of 55,000 and 45,000 daltons were isolated from rat basophilic leukaemia cells by means of IgE-Sepharose. Both molecules were bound by concanavalin A, wheat germ agglutinin and Ricinus communis agglutinin (castor bean lectin). The lectins of pea and gorse origin only bound the 45,000 dalton receptor.