title: Unique biosynthesis by kidney of a biological active vitamin D metabolite.
mesh_terms: D000818:Animals; D001665:Binding Sites; D002127:Calcium Isotopes; D002247:Carbon Isotopes; D002645:Chickens; D002762:Cholecalciferol / Q000378:metabolism*; D002855:Chromatography, Thin Layer; D007413:Intestinal Mucosa / Q000378:metabolism; D007668:Kidney / Q000378:metabolism*; D009392:Nephrectomy; D051381:Rats; D012279:Rickets / Q000378:metabolism; D014316:Tritium
chemical_list: D002127:Calcium Isotopes; D002247:Carbon Isotopes; D014316:Tritium; D002762:Cholecalciferol