title: Presence of antigen-binding cells for five diverse antigens at the onset of lymphoid development: lack of evidence for somatic diversification during ontogeny.
mesh_terms: D000818:Animals; D000918:Antibody Specificity; D001666:Binding Sites, Antibody; D002454:Cell Differentiation; D002642:Chick Embryo; D002846:Chromatography, Affinity; D004622:Embryo, Mammalian / Q000276:immunology; D004926:Escherichia coli / Q000201:enzymology; D005321:Extraembryonic Membranes / Q000276:immunology; D005293:Ferritins; D005452:Fluoresceins; D005696:Galactosidases / Q000302:isolation & purification; D005865:Gestational Age; D006041:Goats / Q000276:immunology; D006410:Hematopoiesis; D006433:Hemocyanins; D007106:Immune Sera; D007075:Immunoglobulin M / Q000302:isolation & purification; D008099:Liver / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology*; D008221:Lymphoid Tissue / Q000254:growth & development; D051379:Mice; D010047:Ovalbumin; D010544:Peroxidases / Q000378:metabolism; D011817:Rabbits; D013950:Thymus Gland / Q000276:immunology
chemical_list: D005452:Fluoresceins; D007106:Immune Sera; D007075:Immunoglobulin M; D010047:Ovalbumin; D005293:Ferritins; D006433:Hemocyanins; D010544:Peroxidases; D005696:Galactosidases