title: The major histocompatibility system and the immune response.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation; D002455:Cell Division; D003602:Cytotoxicity, Immunologic; D005802:Genes, MHC Class II; D006168:Guinea Pigs; D006648:Histocompatibility; D006649:Histocompatibility Antigens / Q000235:genetics / Q000276:immunology; D006801:Humans; D007110:Immunity, Active; D051379:Mice; D051381:Rats; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*
chemical_list: D006649:Histocompatibility Antigens