Zinc and carbonic anhydrase in human semen

Abstract
Zn occurs in high concn. in human semen. The highest concn. of Zn is found in the fraction of the ejaculate, which is mainly composed of prostatic secretion. Spermatozoa contain a higher concn. of Zn than any other human tissue yet examined. The Zn contained in seminal plasma is partly in a dialyzable form. Seminal plasma contains negligible amts. of carbonic anhydrase. A little carbonic anhydrase is found in spermatozoa, but only about 0.05 % of the Zn present in the sperm can be accounted for in this way.