title: A cardinal role for I-region antigens (Ia) in immunological enhancement, and the clinical implications.
mesh_terms: D000818:Animals; D000918:Antibody Specificity; D000936:Antigen-Antibody Complex; D001803:Blood Transfusion; D006084:Graft Rejection; D016027:Heart Transplantation; D006649:Histocompatibility Antigens; D006801:Humans; D007106:Immune Sera; D007108:Immune Tolerance; D007165:Immunosuppression Therapy; D008214:Lymphocytes / Q000276:immunology; D051379:Mice; D051381:Rats; D016038:Skin Transplantation; D014181:Transplantation Immunology
chemical_list: D000936:Antigen-Antibody Complex; D006649:Histocompatibility Antigens; D007106:Immune Sera