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Definition

noun

A major type of blood-group antigen in which galactose is bound at the terminal end of H antigen through the catalytic action of the enzyme encoded by allele B, and defines blood type B

Supplement

Human ABO blood groups are determined based on the type of blood group antigens occurring on the surface of RBCs. These major blood group antigens include H antigen, A antigen, and B antigen. Individuals with blood type B have H and B antigens on their RBCs. B antigens are formed when the B allele codes for the enzyme that catalyzes the binding of galactose to H antigen.

Compare:

• A antigen
• H antigen

See also:

• ABO blood group