title: Positive and negative selection of the T cell repertoire: role of MHC and other ligands.
authors.affiliation: Transplantation Biology, Clinical Research Centre, Harrow, Middlesex, U.K.
authors.forename: E
authors.initials: E
authors.lastname: Simpson
mesh_terms: D000818:Animals; D006801:Humans; D008024:Ligands; D008285:Major Histocompatibility Complex / Q000276:immunology*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology
chemical_list: D008024:Ligands; D016693:Receptors, Antigen, T-Cell, alpha-beta