title: Evidence for a large thyrotropin and its accumulation during aging in rats.
mesh_terms: D000375:Aging; D000818:Animals; D001681:Biological Assay; D003429:Cross Reactions; D005260:Female; D008297:Male; D008970:Molecular Weight; D011863:Radioimmunoassay; D051381:Rats; D013972:Thyrotropin / Q000097:blood*
chemical_list: D013972:Thyrotropin