Abstract
Reduced pyridine nucleotides and related compounds react with acid to yield a primary product that absorbs at 290 mμ. Evidence is presented that suggests that this product is formed by opening the heterocyclic ring yielding an aldehyde. Under strong acid conditions (pH 1), the 290-mμ chromophore is cleaved from the nucleotide giving adenosinediphosphate ribose and a pyridine derivative. The acid product is discussed and related to a postulated mechanism of oxidative phosphorylation at the pyridine nucleotide level.
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