title: Studies on the earliest sites of B cell differentiation in the mouse embryo.
mesh_terms: D000375:Aging; D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology*; D002454:Cell Differentiation; D004622:Embryo, Mammalian / Q000276:immunology*; D005260:Female; D005312:Fetal Blood / Q000276:immunology; D006168:Guinea Pigs; D006410:Hematopoiesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D008099:Liver / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D011247:Pregnancy; D011947:Receptors, Antigen, B-Cell; D013154:Spleen / Q000276:immunology; D015017:Yolk Sac / Q000276:immunology
chemical_list: D007075:Immunoglobulin M; D011947:Receptors, Antigen, B-Cell