riboflavin 5'-phosphate; the coenzyme of a number of oxidation-reduction enzymes, NADH dehydrogenase. Strictly speaking, FMN is not a nucleotide because it contains ribtol instead of ribose; the coenzyme is reversibly reduced to FMNH2.
Synonym(s): riboflavin 5'-phosphate
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Examples: glitazone, GI cocktail, etc.