title: The I-J puzzle.
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface / Q000276:immunology; D002678:Chimera; D002874:Chromosome Mapping; D003602:Cytotoxicity, Immunologic; D006183:H-2 Antigens / Q000235:genetics; D006681:HLA-D Antigens / Q000235:genetics; D000949:Histocompatibility Antigens Class II / Q000235:genetics; D006801:Humans; D008285:Major Histocompatibility Complex; D051379:Mice; D010641:Phenotype; D013601:T-Lymphocytes / Q000145:classification*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D006183:H-2 Antigens; D006681:HLA-D Antigens; D000949:Histocompatibility Antigens Class II