title: Utilization of circulating precursors for the synthesis of testosterone by human testis in vivo.
mesh_terms: D015068:17-Ketosteroids / Q000097:blood*; D000368:Aged; D002247:Carbon Isotopes; D002854:Chromatography, Paper; D003460:Crystallization; D003687:Dehydroepiandrosterone / Q000097:blood / Q000378:metabolism*; D006801:Humans; D007263:Infusions, Parenteral; D008297:Male; D013737:Testis / Q000378:metabolism* / Q000473:pathology; D013739:Testosterone / Q000096:biosynthesis* / Q000097:blood; D014316:Tritium
chemical_list: D015068:17-Ketosteroids; D002247:Carbon Isotopes; D014316:Tritium; D013739:Testosterone; D003687:Dehydroepiandrosterone