title: Diversity and polymorphism in the MHC appear to be generated by a copy mechanism.
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D005796:Genes; D014644:Genetic Variation; D006183:H-2 Antigens / Q000235:genetics; D008285:Major Histocompatibility Complex; D051379:Mice; D009154:Mutation; D011110:Polymorphism, Genetic
chemical_list: D006183:H-2 Antigens; C032876:H-2Kb protein, mouse