title: Precursor cells in density fractions of lymph node cells: relation to antibody-producing cells.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D002499:Centrifugation, Density Gradient; D004912:Erythrocytes / Q000276:immunology; D006386:Hemagglutination Tests; D006462:Hemolytic Plaque Technique; D008198:Lymph Nodes / Q000276:immunology*; D051379:Mice; D011830:Radiation Effects; D013154:Spleen / Q000276:immunology*
chemical_list: D000906:Antibodies