HLA-DR on T and non-T mononuclear leukocytes.
D000818:Animals; D000917:Antibody Formation; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006801:Humans; D007962:Leukocytes / Q000276:immunology*; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D008214:Lymphocytes / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
D000949:Histocompatibility Antigens Class II