Fig. 7.

Immunmoperoxidase staining of MMP2 in stages III and VII of the cycle of mouse seminiferous epithelium. a MMP2 immunostaining, utilizing anti-pMMP2 antibody, is associated with the acrosomic vesicles (arrows) of step 3 spermatids in stage III and the acrosomic cap of step 7 spermatids (arrows) in stage VII. The association of MMP2 with the acrosomic granule (arrows) of step 3 spermatids and the acrosomal membrane (arrows) of step 7 spermatids is seen to have a better advantage at higher magnification in the insets. Bars 10 μm. b Normal rabbit serum control