[Unusually high gamma-glutamyltransferase level in the semen and ist diagnostic significance]

A remarkable high activity of the enzyme gamma-glutamyltransferase (gamma-GT) is found in seminal fluid in 200 to 500 fold higher concentrations as found in blood serum. The seminal fluid gamma-GT originates expecially in the prostate gland and, to a smaller extent, in spermatozoa and secretion of testis and epididymis. Gamma-GT could be valuable to investigate the function of the prostate gland.