title: Germinal centres and the B-cell system: a search for the germinal centre precursor cell in the rat.
mesh_terms: D000818:Animals; D000941:Antigens / Q000276:immunology*; D001402:B-Lymphocytes / Q000166:cytology* / Q000276:immunology; D001854:Bone Marrow Cells; D002454:Cell Differentiation; D051381:Rats; D011919:Rats, Inbred Strains; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology; D013897:Thoracic Duct / Q000166:cytology
chemical_list: D000941:Antigens