title: Evolutionary significance of the HL-A system.
mesh_terms: D000941:Antigens; D001789:Blood Group Antigens; D002874:Chromosome Mapping; D000939:Epitopes; D005260:Female; D005787:Gene Frequency; D005796:Genes; D005815:Genetic Code; D008040:Genetic Linkage; D014644:Genetic Variation; D005828:Genetics, Population; D006579:Heterozygote; D006648:Histocompatibility; D006720:Homozygote; D006801:Humans; D007125:Immunogenetics; D007136:Immunoglobulins / Q000096:biosynthesis; D008297:Male; D008431:Maternal-Fetal Exchange; D011110:Polymorphism, Genetic; D011247:Pregnancy; D044469:Racial Groups; D011995:Recombination, Genetic; D014181:Transplantation Immunology; D014777:Virus Diseases / Q000276:immunology
chemical_list: D000941:Antigens; D001789:Blood Group Antigens; D000939:Epitopes; D007136:Immunoglobulins