The synergism of accessory cells and of soluble alpha-factors derived from them in the activation of B cells to proliferation.
D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D001426:Bacterial Proteins / Q000494:pharmacology; D002455:Cell Division; D002460:Cell Line; D008070:Lipopolysaccharides / Q000494:pharmacology; D008074:Lipoproteins / Q000494:pharmacology; D008213:Lymphocyte Activation; D008211:Lymphocyte Cooperation; D008223:Lymphoma / Q000276:immunology; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D008815:Mice, Inbred Strains / Q000276:immunology; D008934:Mitogens / Q000494:pharmacology; D010954:Plasmacytoma / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*
D001426:Bacterial Proteins; D008070:Lipopolysaccharides; D008074:Lipoproteins; D008934:Mitogens