lipoic acid(redirected from protogen A)
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An organic acid, C8H14S2O2, that is essential for decarboxylation of pyruvate to acetyl coenzyme A during aerobic metabolism. It is also used as a dietary supplement for its antioxidant properties.
(Biochemistry) biochem a sulphur-containing fatty acid, regarded as an element of the vitamin B complex, minute amounts of which are required for carbohydrate metabolism