title: Recognition of altered self.
mesh_terms: D003602:Cytotoxicity, Immunologic; D006680:HLA Antigens / Q000235:genetics*; D000949:Histocompatibility Antigens Class II / Q000235:genetics / Q000276:immunology; D006801:Humans; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D006680:HLA Antigens; D000949:Histocompatibility Antigens Class II