Abstract
SDS-acrylamide gel electrophoresis reveals the presence of a major glycoprotein in human, ox, horse, swine, and sheep erythrocyte membranes. Their apparent molecular weights differ among the various species. The major glycoproteins and additional minor glycoproteins can be recovered in the aqueous phase after extraction of the membranes with a mixture of CHCl 3-CH 3OH at room temperature. The extracted glycoproteins remain in the supernatant after centrifugation at 100,000 g for 60 min. in Tris-EDTA buffer. These glycoprotein preparations possess high activities for the phaseolus vulgaris phytohemagglutinin receptor, the infectious mononucleosis heterophile antigen, and the myxovirus receptor. Their specific activities and yields differ markedly from species to species.
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