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Biology of Reproduction, Vol 14, 339-346, Copyright © 1976 by Society for the Study of Reproduction
1 Departments of Pathology and Anatomy,
Harvard Medical School,
Laboratory of Human Reproduction and Reproductive Biology and
Department of Pathology,
Beth Israel Hospital,
Boston, Massachusetts 02115 Carbonic anhydrase is demonstrated in the rat epididymis and testis by histochemical
techniques and in the epididymis by biochemical assay. Enzyme activity is present along the entire
length of the epididymal duct but is restricted to certain kinds of cells. In the zone where
acidification of epididymal fluid occurs (initial segment), the apical cells are distinctively active,
thus suggesting a possible function for this cell type. In more distal regions of the epididymis and
in the vas, individual cuboidal cells are rich in this enzyme. Interstitial tissue of perfused testes also
shows carbonic anhydrase activity confirming the biochemical studies by others showing testicular
carbonic anhydrase activity.
Accepted on November 19, 1975
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