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Colleen
Biotin is a water-soluble B-complex vitamin (vitamin B7) It was discovered by Bateman in 1916. It is composed of a ureido (tetrahydroimidizalone) ring fused with a tetrahydrothiophene ring. A valeric acid substituent is attached to one of the carbon atoms of the tetrahydrothiophene ring. Biotin is a coenzyme in the metabolism of fatty acids and leucine, and it plays a role in gluconeogenesis.
http://en.wikipedia.org/wiki/Biotin
http://en.wikipedia.org/wiki/Biotin
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