Antigen recognition.
D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology / Q000378:metabolism; D000941:Antigens / Q000276:immunology* / Q000378:metabolism; D006680:HLA Antigens / Q000276:immunology; D006649:Histocompatibility Antigens / Q000276:immunology; D006801:Humans
D000941:Antigens; D006680:HLA Antigens; D006649:Histocompatibility Antigens