Abstract
Kinetic data were obtained to further characterize the acrosomal proteinase of epididymal, ejaculated, and capacitated rabbit spermatozoa. The studies demonstrated that the properties examined were not altered during capacitation, and there is no evidence for a direct involvement of these enzymes in capacitation. Marked differences were noted, however, between the inhibitory effects of lima bean trypsin inhibitor and p-aminobenzamidine on acrosomal proteinase and bovine pancreatic trypsin (EC 3.4.4.4). Lima bean trypsin inhibitor displayed partial specificity for pancreatic trypsin, while p-aminobenzamidine showed partial specificity for acrosomal proteinase.
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