Localization of kallikrein in human male genital organ

Male genital organs (testis, epididymis, seminal vesicle and vas deferens) were stained by the peroxidase-antiperoxidase (PAP) method to clarify the localization of kallikrein. Sertoli cells of the testis, epithelial cells of the epididymis, and adenocytes of the prostate gland were specifically stained showing that endogenous kallikrein was localized in these cells.