NADH
From Proteopedia
NAD (Nicotinamide Adenine Dinucleotide)
Nicotinamide Adenine Dinucleotide (NAD) is a coenzyme that participates in electron transfer reactions. The oxidized form of NAD is abbreviated as NAD+ and it can accept two electrons. The reduced form of NAD is abbreviated as NADH.
Equation for the redox reaction for these two forms of NAD: NAD+ + 2H → NADH + H+