Fig. 6. Immunoperoxidase localization of prominin-1 in the tail of spermatozoa found in seminiferous tubules. Cryosections of adult murine testis (A,B) and epididymis (C) were immunolabeled with (A-C) or without (A'-C') mAb 13A4 followed by peroxidase-coupled goat anti-rat, and observed using Nomarski optics. (A) Arrows indicate the lumen of seminiferous tubules. (B) The asterisk indicates the tail of spermatozoa, shown at high magnification in the inset. (C) Arrowheads indicate the apical surface of the corpus epithelium. Scale bars, 170 µm (A,A'); 30 µm (B,B'); 40 µm (C,C').