Demonstration of proacrosin and quantitation of acrosin in ejaculated human spermatozoa

Proacrosin has been isolated from human ejaculated spermatozoa and constitutes at least 90% of the total acrosin present. The total amount of acrosin in milli-international units per million spermatozoa was between 4.4 and 8.9, with a mean of 6.5. This is the first report of the demonstration of proacrosin and the quantitation of total acrosin in human spermatozoa.