The perforatorium and postacrosomal sheath of rat spermatozoa share common developmental origins and protein constituents†Nicole Protopapas(Queen's University), Richard Oko(Queen's University)Biology of ReproductionApril 2, 201910.1093/biolre/ioz052Cited by 21SaveCiteExport RISWatch citationsRelated PapersMMP2 and acrosin are major proteinases associated with the inner acrosomal membrane and may cooperate in sperm penetration of the zona pellucida during fertilization|Cell and Tissue Research|2012|87