title: Conversion of progesterone-4-C14 to testosterone by testicular tissue of the American bullfrog.
mesh_terms: D000818:Animals; D001001:Anura / Q000378:metabolism*; D002247:Carbon Isotopes; D002854:Chromatography, Paper; D003460:Crystallization; D006908:Hydroxyprogesterones / Q000032:analysis; D066298:In Vitro Techniques; D007659:Ketones / Q000378:metabolism; D008297:Male; D011374:Progesterone / Q000032:analysis / Q000378:metabolism*; D011865:Radioisotope Dilution Technique; D051381:Rats; D013737:Testis / Q000378:metabolism*; D013739:Testosterone / Q000096:biosynthesis*
chemical_list: D002247:Carbon Isotopes; D006908:Hydroxyprogesterones; D007659:Ketones; D013739:Testosterone; D011374:Progesterone