COENZYMES : Coenzymes Derived From Niacin (NAD/NADH)

Point to be noted that

Many enzymes catalyze biochemical reactions as such. However, the active site of a large number of enzymes require specially constructed functional groups.Such groups are provided by relatively small non-protein molecules called Cofactor.Cofactor may be an organic molecule normally referred to as COENZYME or it may be metal ion called a prothestic group.The enzyme-activator combination is referred to as holoenzymeThe inactive enzyme left after the removal of a enzyme is called Apoenzyme.

Coenzymes Derived From Niacin (NAD/NADH)

Nicotinamide is the biologically active form of the vitamin niacin (nicotinic acid).