title: Studies on the metabolism of calciferol. XIV: Evidence of a circadian rhythm in the activity of the 25-hydroxyvitamin D3-1-hydroxylase.
mesh_terms: D015090:25-Hydroxyvitamin D3 1-alpha-Hydroxylase / Q000378:metabolism*; D000818:Animals; D002645:Chickens / Q000378:metabolism*; D002940:Circadian Rhythm; D007668:Kidney / Q000201:enzymology*; D008297:Male; D010281:Parathyroid Hormone / Q000097:blood; D013250:Steroid Hydroxylases / Q000378:metabolism*
chemical_list: D010281:Parathyroid Hormone; D013250:Steroid Hydroxylases; D015090:25-Hydroxyvitamin D3 1-alpha-Hydroxylase