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  • Title: Assay of alpha-D-galactosyltransferase of subgroup B sera.
    Author: Kogure T, Nakajima T, Takeya A, Hosomi O, Furukawa K.
    Journal: Exp Clin Immunogenet; 1986; 3(2):81-7. PubMed ID: 3152594.
    Abstract:
    Carriers of weak B antigen were found in three generations of a family. The red cells of the propositus reacted with anti-A human serum and Dolichos biflorus lectin as strongly as normal A1B red cells, but they agglutinated at 8-fold dilution against anti-B human serum (1:128) and did not have a mixed-field agglutination. The red cells of her niece agglutinated at 32-fold dilution against the same anti-B serum and did not have a mixed-field pattern. Her red cells were provisionally designated B2, analogous to A2 of subgroup A. B antigen of the propositus appeared clearly depressed, and she was provisionally designated A1B2. When papain-treated O red cells were used as acceptors instead of untreated O red cells, group A1B2 sera could convert them into B-active cells, which were agglutinated by anti-B human serum. alpha-D-galactosyltransferase activity in A1B2 serum was about one-eighth that in normal B serum.
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