title: Immunogenetic aspects of biologic communication: a hypothesis of evolution by program duplication.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D005075:Biological Evolution; D002450:Cell Communication; D002454:Cell Differentiation; D002462:Cell Membrane / Q000276:immunology; D000939:Epitopes; D005260:Female; D005796:Genes; D006648:Histocompatibility; D006801:Humans; D007109:Immunity; D008211:Lymphocyte Cooperation; D008297:Male; D051379:Mice; D008954:Models, Biological; D010641:Phenotype; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000939:Epitopes