title: Hypothesis: why do so many lymphocytes respond to major histocompatibility antigens?
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000276:immunology; D006649:Histocompatibility Antigens; D007111:Immunity, Cellular; D066298:In Vitro Techniques; D007519:Isoantigens; D051379:Mice; D008815:Mice, Inbred Strains; D008954:Models, Biological; D009154:Mutation; D013045:Species Specificity; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D006649:Histocompatibility Antigens; D007519:Isoantigens