Metallic elements are essential components of many important enzymes operating within

Chapter 24, Problem 24.71

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Metallic elements are essential components of many important enzymes operating within our bodies. Carbonic anhydrase, which contains Zn2+, is responsible for rapidly interconverting dissolved C02 and bicarbonate ion, HC03 -. The zinc in carbonic anhydrase is coordinated by three nitrogen-containing groups and a water molecule. The enzyme's action depends on the fact that the coordinated water molecule is more acidic than the bulk solvent molecules. Explain this fact in terms of Lewis acid-base theory (Section 16.11).

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