title: Two B-cell subpopulations identified by flow cytometry.
abstract: Ig+ spleen cells were analysed by light scatter analysis on a flow cytometer and two distinct subpopulations were identified. The large Ig+ cells (10-11 micron in diameter) were found in spleen and bone marrow, whereas the small Ig+ cells (7-8 micron in diameter) were found in all lymphoid tissues. Of the total Ig+ splenic lymphocytes, 40-60% were large Ig+ cells and had surface IgM, Ia and Fc gamma receptors. The large Ig+ cells were highly enriched for responsiveness to the B-cell mitogens, anti-Ig, Nocardia water-soluble mitogen and LPS, whereas the small Ig+ splenic cells had little or no responsiveness to these mitogens.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology* / Q000276:immunology; D002469:Cell Separation; D005434:Flow Cytometry; D000949:Histocompatibility Antigens Class II / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D008938:Mitosis / Q000187:drug effects; D011817:Rabbits; D011947:Receptors, Antigen, B-Cell / Q000032:analysis; D011961:Receptors, Fc / Q000032:analysis; D013154:Spleen / Q000166:cytology; D014018:Tissue Distribution
chemical_list: D000949:Histocompatibility Antigens Class II; D007075:Immunoglobulin M; D011947:Receptors, Antigen, B-Cell; D011961:Receptors, Fc