Synonyms : Class II Antigen, Class II Histocompatibility Antigens, Class II Major Histocompatibility Antigens, I-A Antigen, I-A-Antigen, IA Antigen, Antigen, Class II, Antigen, I-A, Antigen, IA, Antigens, Class II, Antigens, Ia, Antigens, Ia-Like, Antigens, Immune-Associated