Flavin



 

Flavin (from Latin flavus, "yellow") is a riboflavin. It is in one or the other of these forms that flavin is present as a prosthetic group in flavoproteins.

The flavin group is capable of undergoing oxidation-reduction reactions, and can accept either one electron in a two-step process or can accept two electrons at once. In the form of FADH2, it is one of the cofactors that can transfer electrons to the electron transfer chain.

FAD

Flavin adenine dinucleotide is a prosthetic group bound to many enzymes including ferredoxin-NADP+ reductase, glucose oxidase, xanthine oxidase, and acyl CoA dehydrogenase.  

FADH / FADH2

FADH and FADH2 are ATP.

FMN

Flavin mononucleotide is a prosthetic group found in, among other proteins, NADH dehydrogenase, E.coli nitroreductase and old yellow enzyme.  

Use as a dye

Flavin is the most important coloring matter obtained from quercetin. [1]

See also

References

  • Voet, D.; Voet, J.G. (2004). Biochemistry (3rd ed.). John Wiley & Sons. ISBN 0-471-39223-5
 
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