title: Not second class: the first class II MHC crystal structure.
authors.affiliation: Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125 bjorkman@caltech.edu.
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Bjorkman
mesh_terms: D018360:Crystallography, X-Ray; D015395:Histocompatibility Antigens Class I / Q000276:immunology / Q000648:ultrastructure; D000949:Histocompatibility Antigens Class II / Q000276:immunology* / Q000648:ultrastructure*; D006801:Humans; D011948:Receptors, Antigen, T-Cell / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology
chemical_list: D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D011948:Receptors, Antigen, T-Cell