NADH is the reduced form of nicotinamide adenine dinucleotide (NAD) that can donate electrons as part of a reducing reaction. In that process, NADH becomes oxidized to produce NAD+ (Cay-16077). A variety of enzymes use NADH plus H+ to reduce substrates, generating NAD+ as well as the reduced product. For example, NADH:ubiquinone oxidoreductase accepts two electrons from NADH and passes them to ubiquinone (coenzyme Q) as part of the mitochondrial electron transport chain.
Nicotinamide adenine dinucleotide, reduced, nicotinamide adenine dinucleotide, disodium salt