Autoantigen

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autoantigen [ô′tō·an′tijin] Etymology: Gk, autos + anti, against, genein, to produce an endogenous body constituent that stimulates the production of autoantibodies and an autoimmune reaction. An autoantigen associated with Addison's disease has been identified as the enzyme 17 α-hydroxylase. Also called self-antigen. See also antibody-specific model, autoantibody, autoimmune disease.