A flavin mononucleotide that is riboflavin (vitamin B2) in which the 4' and 5' hydroxy groups have been converted into a cyclic hydrogen phosphate ester.
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This entity has been manually annotated by the ChEBI Team.
An organic molecule or ion (usually a metal ion) that is required by an enzyme for its activity. It may be attached either loosely (coenzyme) or tightly (prosthetic group).