The major influence on helper T cell cooperative partner cell preferences is exerted by the extrathymic environment.
D000818:Animals; D000831:Animals, Newborn; D001402:B-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation; D002678:Chimera; D006824:Hybridization, Genetic; D007108:Immune Tolerance; D008211:Lymphocyte Cooperation; D008285:Major Histocompatibility Complex; D051379:Mice; D008805:Mice, Inbred A; D008807:Mice, Inbred BALB C; D010641:Phenotype; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology*