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Partial reversal of the acetaldehyde and butyraldehyde oxidation reactions catalysed by aldehyde dehydrogenases from sheep liver



Partial reversal of the acetaldehyde and butyraldehyde oxidation reactions catalysed by aldehyde dehydrogenases from sheep liver



Biochemical Journal 175(2): 753-756



In the presence of acetic anhydride or butyric anhydride, liver aldehyde dehydrogenases catalyse the oxidation of NADH at pH 7.0 and 25 degrees C. The maximum velocities and Michaelis constants for NADH at saturating anhydride concentrations are independent of which anhydride is used, the values being V'max. = 12 min-1 and Km for NADH = 9 micrometer for the mitochondrial enzyme and V'max = 25 min-1 and Km for NADH = 20 micrometer for the cytoplasmic enzyme. Substitution of [4A-2H]NADH for NADH resulted in 2-fold and 4-fold decreases in rate for the mitochondrial and cytoplasmic enzymes respectively.

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Accession: 016608164

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PMID: 217349

DOI: 10.1042/bj1750753


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