title: Recognition of antigen by B and T lymphocytes.
mesh_terms: D000917:Antibody Formation; D000941:Antigens; D001402:B-Lymphocytes / Q000276:immunology*; D001665:Binding Sites; D002462:Cell Membrane / Q000276:immunology; D000939:Epitopes; D005796:Genes; D005934:Glucagon / Q000276:immunology; D006241:Haptens; D007156:Immunologic Memory; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000941:Antigens; D000939:Epitopes; D006241:Haptens; D005934:Glucagon