title: Plaque-forming cells of two different origins in single hemolytic foci.
mesh_terms: D000818:Animals; D000921:Antibody-Producing Cells; D001853:Bone Marrow / Q000276:immunology*; D001854:Bone Marrow Cells; D003036:Cobalt Isotopes; D004912:Erythrocytes / Q000276:immunology*; D006461:Hemolysis; D006462:Hemolytic Plaque Technique; D007106:Immune Sera / Q000494:pharmacology; D008297:Male; D051379:Mice; D011830:Radiation Effects; D013154:Spleen / Q000276:immunology*; D013897:Thoracic Duct / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology*
chemical_list: D003036:Cobalt Isotopes; D007106:Immune Sera