title: Polymorphism of age-dependent changes in the production of a Thf helper factor.
mesh_terms: D000375:Aging; D000818:Animals; D005260:Female; D006462:Hemolytic Plaque Technique; D007375:Interleukin-1; D008211:Lymphocyte Cooperation; D051379:Mice; D008805:Mice, Inbred A / Q000276:immunology; D008810:Mice, Inbred C57BL / Q000276:immunology; D008815:Mice, Inbred Strains / Q000276:immunology; D011506:Proteins / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
chemical_list: D007375:Interleukin-1; D011506:Proteins