title: Circadian periodicity in thyroid stimulating hormone titer in the rat hypophysis and serum.
abstract: Thyroid stimulating hormone (TSH) activity in the hypophyses of euthyroid and hypothyroid rats and the sera of hypothyroid rats maintained under standardized conditions were assayed. The concentration of TSH in the gland and serum exhibited a circadian rhythm.
authors.forename: John L
authors.initials: JL
authors.lastname: Bakke
authors.forename: Nancy
authors.initials: N
authors.lastname: Lawrence
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D007037:Hypothyroidism; D008297:Male; D010507:Periodicity; D010902:Pituitary Gland / Q000737:chemistry* / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013972:Thyrotropin / Q000097:blood*
chemical_list: D013972:Thyrotropin