Flavin mononucleotide
Other names	FMN
Identifiers
CAS number	146-17-8 Y
PubChem	710
MeSH	Flavin+mononucleotide
SMILES	O=C(N3)C2=NC1=CC(C)=C(C)C=C1N(C[C@H] (O)[C@H](O)[C@@H](COP(O)(O)=O)O)C2=NC3=O
Properties
Molecular formula	C17H21N4O9P
Molar mass	456.344 g/mol
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

This article needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (December 2009)

Flavin mononucleotide (FMN), or riboflavin-5′-phosphate, is a biomolecule produced from riboflavin (vitamin B₂) by the enzyme riboflavin kinase and functions as prosthetic group of various oxidoreductases including NADH dehydrogenase. During catalytic cycle, the reversible interconversion of oxidized (FMN), semiquinone (FMNH^•) and reduced (FMNH₂) forms occurs. FMN is a stronger oxidizing agent than NAD and is particularly useful because it can take part in both one and two electron transfers.

It is the principal form in which riboflavin is found in cells and tissues. It requires more energy to produce, but is more soluble than riboflavin.

Designated with E number E101a^{[citation needed]}, it is used as a food dye and is likely derived from genetically modified organisms.

E106, a very closely related food dye, is riboflavin-5′-phosphate sodium salt, which consists mainly of the monosodium salt of the 5′-monophosphate ester of riboflavin. It is rapidly turned to free riboflavin after ingestion. It is found in many foods for babies and young children as well as jams, milk products, and sweets and sugar products.

[edit] External links

• FMN in the EBI Macromolecular Structure Database

[edit] See also

• FAD
• NAD