PT - JOURNAL ARTICLE AU - Stephan Steckelbroeck AU - Yi Jin AU - Busola Oyesanmi AU - Helenius J Kloosterboer AU - Trevor M. Penning TI - Tibolone is metabolized by the 3α/3β-hydroxysteroid dehydrogenase (HSD) activities of the four human isozymes of the aldo-keto reductase (AKR)1C subfamily: inversion of stereo-specificity with a δ<sup>5(10)</sup>-3-ketosteroid AID - 10.1124/mol.104.004515 DP - 2004 Sep 21 TA - Molecular Pharmacology 4099 - http://molpharm.aspetjournals.org/content/early/2004/09/21/mol.104.004515.short 4100 - http://molpharm.aspetjournals.org/content/early/2004/09/21/mol.104.004515.full