title: Comparative studies on the 25-hydroxylation of vitamin D 3  and dihydrotachysterol 3 .
mesh_terms: D000818:Animals; D004097:Dihydrotachysterol / Q000008:administration & dosage / Q000378:metabolism* / Q000494:pharmacology; D008099:Liver / Q000201:enzymology; D006899:Mixed Function Oxygenases / Q000378:metabolism*; D051381:Rats; D013997:Time Factors; D014316:Tritium; D014807:Vitamin D / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism* / Q000494:pharmacology
chemical_list: D014316:Tritium; D014807:Vitamin D; D006899:Mixed Function Oxygenases; D004097:Dihydrotachysterol