A Metabolic Regulator in Mammalian Spermatozoa

Abstract
The high oxygen consumption and feeble Pasteur effect in ejaculated compared to epididymal bovine spermatozoa are due to the liberation of an activator, soluble in organic solvents, which is capable of stimulating aerobic fermentation of yeast or spermatozoa. The regulator is present in an inactive bound form in epididymal sperm, but is liberated upon standing, even in refrigerator. The regulator probably plays an important part in the senscence of stored sperm.
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