The identity of the acid and alkaline phosphatases of human seminal plasma

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Abstract
Examination of human seminal plasma showed that there was no p-nitrophenylphosphatase activity maximum at alkaline pH values. A constant ratio of enzyme activities in 8 split ejaculates, identical temperature dependence and copurification through a 3-step purification procedure led to the conclusion that the alkaline phosphatase in human semen is identical to acid phosphatase.