MN blood group antigens

MN blood group antigens
A pair of blood group antigens governed by genes that segregate independently of the ABO locus. The alleles are co-dominant and there are three types MM, NN, and MN. Glycophorin has M or N activity and this is associated with oligosaccharides attached to the amino terminal portion of the molecule. M-type glycophorin differs from N-type in amino acid residues 1 and 5, although the antigenic determinants are associated with the carbohydrate side chains.

Dictionary of molecular biology. 2004.

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