Description_x000D_ Application_x000D_ Riboflavin 5′-monophosphate (FMN) is used as a prosthetic group by oxidoreductase (one and two electron transfer) enzymes such as NADH dehydrogenase, nitric oxide synthase, and nitrilotriacetate monooxygenase. Riboflavin 5′-monophosphate is used as a substrate to study the specificity and kinetics of FMN phosphohydrolases and to study molecular sensing based gene regulation by riboswitches._x000D_ Riboflavin 5′-monophosphate sodium salt hydrate has been used:_x000D_ • as a component of assay buffer to determine the luminescence of L. lactis cells_x000D_ • as a component of the reaction mixture in NOS (Nitric oxide synthase) enzymatic activity assay_x000D_ • in the HPLC analysis of FMN (Flavin mononucleotide) cyclase products_x000D_ Packaging_x000D_ 10, 25 mg in glass insert_x000D_ 100 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Biologically active in the growth of L. casei (ATCC Strain 7469).