这种17β-羟基类固醇脱氢酶的亚型主要在睾丸中表达，并催化雄烯二酮转化为睾酮它优先使用NADP作为辅因子缺乏可导致男性假两性畸形伴男性乳房发育。[由RefSeq提供，2008年7月]
This isoform of 17 beta-hydroxysteroid dehydrogenase is expressed predominantly in the testis and catalyzes the conversion of androstenedione to testosterone. It preferentially uses NADP as cofactor. Deficiency can result in male pseudohermaphroditism with gynecomastia. [provided by RefSeq, Jul 2008]