NADH

Nicotinamide adenine dinucleotide consists of two nucleotides: one nucleotide containing an adenine base, and the other containing nicotinamide, joined by their phosphate groups. NAD⁺ (the abbreviated deprotonated form of NADH) is a coenzyme found in most cellular organisms. The molecule is important in metabolic oxidation-reduction reactions due to its electron transfer capability of its two forms, NADH (reduced form) and NAD⁺ (oxidized form).