Immunohistochemical staining with anti-Ship antibody on sections across adult testis. (a) Cross section of a seminiferous tubule shows positive staining within the tubule. (b) Cross section of a seminiferous tubule photographed under higher magnification with basal layer of the tubule on the right, lumen on the left. S, spermatogonia; St, Sertoli cells; arrows point to spermatids. (c) Indirect fluorescence staining with anti-Ship antibody on adjacent section of panel a. ship expression is visualized by the green fluorescence in spermatids. Original magnifications: ×200 for a and c; ×400 for b.