title: A challenge to the instructive model of positive selection.
authors.affiliation: Laboratoire de Génétique Moléculaire des Eucaryotes du CNRS, Institut de Chimie Biologique, Strasbourg, France.
authors.forename: S H
authors.initials: SH
authors.lastname: Chan
authors.forename: C
authors.initials: C
authors.lastname: Benoist
authors.forename: D
authors.initials: D
authors.lastname: Mathis
mesh_terms: D000818:Animals; D015704:CD4 Antigens / Q000502:physiology*; D016827:CD8 Antigens / Q000502:physiology*; D002454:Cell Differentiation / Q000502:physiology; D008285:Major Histocompatibility Complex / Q000502:physiology; D051379:Mice; D008954:Models, Biological; D011948:Receptors, Antigen, T-Cell / Q000502:physiology*; D013601:T-Lymphocytes / Q000502:physiology*; D013950:Thymus Gland / Q000166:cytology*
chemical_list: D015704:CD4 Antigens; D016827:CD8 Antigens; D011948:Receptors, Antigen, T-Cell