diphosphopyridine nucleotide

Diphosphopyridine nucleotide, also known as NAD or nicotinamide adenine dinucleotide, is a coenzyme crucial for intermediary metabolism. It functions as an oxidizing agent and, in its reduced form, as a reducing agent for various metabolites. NAD plays a vital role in all phases of metabolism, acting as a carrier of hydrogen atoms or electrons in oxidation-reduction reactions. This coenzyme is essential for energy conservation within cells, particularly through oxidative phosphorylation, where it facilitates the transfer of reducing equivalents to molecular oxygen, ultimately leading to the synthesis of ATP. NAD is synthesized from precursors like glucose.123