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  • Title: The interaction of liver alcohol dehydrogenase with NADH as studied by differential protein denaturation.
    Author: Gafni A, Brand L.
    Journal: Biochim Biophys Acta; 1978 Dec 20; 537(2):446-55. PubMed ID: 215220.
    Abstract:
    Heat denaturation of horse liver alcohol dehydrogenase was followed in the presence of isobutyramide at various degrees of saturation of the binding sites by NADH. A study of the fluorescence enhancement which is observed when an excess of NADH is added to the partially denatured mixtures provides information regarding the relative concentrations of mono- and bioccupied enzyme molecules. This approach is of value in situations when the association constants for coenzyme are so large that the concentration of the free ligand is negligible. The results obtained indicate that the binding of NADH to liver alcohol dehydrogenase follows the statistically predicted distribution. At the same time evidence was obtained for interaction between the two subunits of the enzyme.
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