Chemically, pantothenic acid is considered to be a ¡-alanine derivative of the asymmetric pantoic acid and thus shows asymmetry (Fig. 28.31). Only the naturally occurring d(+)-stereoisomer (with R configuration) is biologically active and the L(-)-stereoisomer (with S configuration) is inactive. When its carboxylate functional group is attached through an amide linkage with ¡-mercaptoethylamine, it is known as pantetheine (also spelled pantotheine). The biologically active form of pantothenic acid, CoA, is formed when the terminal alcoholic function of pantetheine is attached to ADP 3'-phosphate as shown in Figure 28.32.


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Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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