Histological evaluation of the testis of wild type C57BL/6J and <i>Trail^−/−</i> mice at PND 28.

<p>Testicular cross sections (5 µm) from paraffin embedded tissue were examined by PAS-H (periodic acid-Schiff-hematoxylin) staining. (A) and (E) are from wild type mice, while (C) and (G) are from <i>Trail^−/−</i> mice. The square box in each section indicates the area that is magnified in the right panel. (B, D, F, and H). <i>Trail^−/−</i> mice appear to have more tubules containing meiotic figures (denoted with an “M”) and fewer tubules with mature spermatid heads (G, denoted with an “S”) than the wild type. The bar represents 50 µm.