title: Inhibition of lymphocyte production via thymic factors.
mesh_terms: D000818:Animals; D002417:Cattle; D006863:Hydrogen-Ion Concentration; D008213:Lymphocyte Activation; D008970:Molecular Weight; D051381:Rats; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000502:physiology*