alloantigen(redirected from alloantigenic)
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Related to alloantigenic: isoantigen, autoantigen, alloantibody, heterophile antigen, xenoantigen, heteroantigen
An antigen that occurs in some but not all members of the same species. Used by the immune system to distinguish self from nonself.
alloantigenAn antigen that occurs in some members of a species, which in humans is determined in part by the major histocompatibility complex.
An antigen that occurs in some, but not in other members of the same species. The term isoantigen is sometimes used in this sense.