Activity of B‐Gene‐Specified Galactosyltransferase in Individuals with Bm Phenotypes1

Abstract
Blood group B-gene-specified alpha-galactosyltransferase was determined in serums and erythrocyte membranes of several related persons with Bm phenotypes. The level of this enzyme in serums was similar to, but in erythrocyte membranes much lower than that found in normal B and AB persons.