Abstract
The cytochemical localization of 17β-SDH, 3β-SDH, and 3α-SDH was made in human seminal vesicle, deferential ampulla and prostate. The enzymes showed a remarkable activity in the epithelial cells of all glands. The epithelia of prostate, seminal vesicle, and deferential ampulla were able to metabolize androgens through the reductive pathway, characteristic of target tissues.