A three-ring system that is the active group of flavin cofactors. For those who are interested:

C1(=O)NC(=O)C2=Nc3cc(C)c(C)cc3N(R)C2=N1

It is an ancient molecule that looks strangely similar to a nucleotide (and is one, essentially as FMN). Its synthesis is from GTP - as can be seen from the nitrogen hetrocyclic rings.

A derivative of riboflavin (vitamin B2) which can exist as a chemical group of other important biomolecules such as flavin adenine dinucleotide (FAD) or flavin mononucleotide (FMN).

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

Fla"vin (?), n. [L. flavus yellow.] Chem.

A yellow, vegetable dyestuff, resembling quercitron.

 

© Webster 1913.

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