title: Antigen recognition.
mesh_terms: D000818:Animals; D017951:Antigen Presentation / Q000276:immunology; D000941:Antigens / Q000276:immunology*; D006649:Histocompatibility Antigens / Q000276:immunology; D006801:Humans; D011946:Receptors, Antigen / Q000276:immunology
chemical_list: D000941:Antigens; D006649:Histocompatibility Antigens; D011946:Receptors, Antigen