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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Fluorescence decay studies of reduced nicotinamide adenine dinucleotide in solution and bound to liver alcohol dehydrogenase.

The monophoton counting technique was used to obtain the fluorescence decay kinetics of NADH (dihydronicotinamide adenine dinucleotide) bound to LADH (HORSE LIVER ALCOHOL DEHYDROGENAS). It was found that the fluorescence decay of the enzyme complex did not follow a single exponential decay law but that the data could be well described as a sum of two exponentials. The decay parameters of the enzyme complex do not depend on the degree of binding-site saturation. These results are interpreted in terms of a reversible excited-state reaction forming a nonfluorescent product. Fluorescence decay kinetics are also reported for NADH and related molecules in solution. The decay parameters, fluorescence emission maxima, and fluorescence intensities depend on solvent polarity and viscosity.[1]

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