title: Conditions determining the generation and expression of T helper cells.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D001853:Bone Marrow / Q000276:immunology; D002678:Chimera; D002999:Clone Cells / Q000276:immunology; D000939:Epitopes; D004912:Erythrocytes / Q000276:immunology; D006241:Haptens; D006649:Histocompatibility Antigens; D008213:Lymphocyte Activation; D051379:Mice; D008815:Mice, Inbred Strains; D011995:Recombination, Genetic; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000939:Epitopes; D006241:Haptens; D006649:Histocompatibility Antigens