n :  a coenzyme C₂₁H₂₈N₇O₁₇P₃ of numerous dehydrogenases (as that acting on glucose-6-phosphate) that occurs esp. in red blood cells and plays a role in intermediary metabolism similar to NAD but acting often on different metabolites - called also nicotinamide adenine dinucleotide phosphate , TPN , triphosphopyridine nucleotide  .
 
 
 
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