title: Which came first, MHC class I or class II?
authors.affiliation: Department of Microbiology and Immunology, University of Miami, FL 33101.
authors.forename: M F
authors.initials: MF
authors.lastname: Flajnik
authors.forename: C
authors.initials: C
authors.lastname: Canel
authors.forename: J
authors.initials: J
authors.lastname: Kramer
authors.forename: M
authors.initials: M
authors.lastname: Kasahara
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005075:Biological Evolution; D006360:Heat-Shock Proteins / Q000737:chemistry; D015395:Histocompatibility Antigens Class I / Q000737:chemistry*; D000949:Histocompatibility Antigens Class II / Q000737:chemistry*; D006801:Humans; D008969:Molecular Sequence Data
chemical_list: D006360:Heat-Shock Proteins; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II