title: Active mechanisms of immunological tolerance.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000918:Antibody Specificity; D000941:Antigens / Q000276:immunology; D001717:Birds / Q000276:immunology; D002999:Clone Cells / Q000276:immunology; D006082:Graft Enhancement, Immunologic; D006801:Humans; D007108:Immune Tolerance; D051379:Mice; D008954:Models, Biological; D050378:T-Lymphocytes, Regulatory / Q000276:immunology; D014181:Transplantation Immunology
chemical_list: D000941:Antigens