Vitamins are precursors to coenzymes Coenzymes are small organic cofactors that are required for enzyme activity OH CH2OH CH>OH CH2OH HOH2C. OH O H3C CHs OH CHs Vitamin Bs Vitamin C Vitamin B3 Vitamin B6 (Pantothenate) H 一OH (Ascorbic acid) (Niacin) (Pyridoxine) H OH H -OH CH2OH Vitamin B2 (Riboflavin)Vitamins are precursors to coenzymes Coenzymes are small organic cofactors that are required for enzyme activity