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Pattern of antigens A and B distribution on the surface of AB group red blood cells--an argument in support of the concept of "genetic oscillation".

Using a mixture of mouse monoclonal antibodies anti red blood cell (RBC) AgA and human antibodies anti RBC AgB coupled to fluorescein isothiocyanate (FITC) conjugated goat antimouse monoclonal antibodies and to phycoerythrin (PE) conjugated goat antihuman monoclonal antibodies, we obtained the distribution of these antigens on the AB RBC surface. The analysis of 30 samples of 30,000-100,000 RBCs each was carried out using flow cytometry and revealed three kinds of AB RBC populations: (1) a population characterized by maximum concentration of AgA and minimum concentration of AgB; (2) a complementary population characterized by minimum concentration of AgA and maximum concentration of AgB; (3) an intermediary equilibrated population with about equal concentrations of the A and B antigens. This pattern corresponds to the pattern of oscillating genetic activity defined as "genetic oscillation", a concept amply discussed in the paper.