title: Recognizing self from nonself.
authors.forename: D E
authors.initials: DE
authors.lastname: Koshland
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D006801:Humans; D007108:Immune Tolerance; D051379:Mice; D008822:Mice, Transgenic; D013601:T-Lymphocytes / Q000276:immunology