aldo-keto reductase family 1, member C6 Gene; Active toward androgens, estrogens, and xenobiotic substrates. Also exhibits low 20 alpha-HSD activity. Shows a- stereospecificity in hydrogen transfer between cofactors and substrates (A-specific). Preferentially catalyzes the reduction of 4-androstenedione, 5-alpha-androstane-3,17-dione, androsterone and dehydroepiandrosterone to testosterone, dihydrotestosterone, 5- alpha-androstane-3-alpha,17-beta-diol and 5-androstene-3-beta,17- beta-diol, respectively (323 aa)