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triphosphopyridine nucleotide[trī¦fä·sfō′pir·ə‚dēn ′nü·klē·ə‚tīd]
C12H28N7O17P3 A grayish-white powder, soluble in methanol and in water; a coenzyme and an important component of enzymatic systems concerned with biological oxidation-reduction systems. Abbreviated TPN. Also known as codehydrogenase II; coenzyme II; triphosphopyridine dinucleotide.