The major penetrating membrane glycoprotein (band 3) was isolated from En(a-) and normal human erythrocytes. The two proteins differed only in carbohydrate composition. Band 3 from En(a-) erythrocytes contained greater amounts of galactose and N-acetyl-glucosamine. The loss of the sialoglycoprotein sialotetrasaccharides in the En(a-) cell is not compensated by the appearance of these units in band 3 of En(a-) erythrocytes.
Abnormal carbohydrate composition of the major penetrating membrane protein of En(a-) human erythrocytes
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M J Tanner, R E Jenkins, D J Anstee, J R Clamp; Abnormal carbohydrate composition of the major penetrating membrane protein of En(a-) human erythrocytes. Biochem J 1 June 1976; 155 (3): 701–703. doi: https://doi.org/10.1042/bj1550701
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