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The enzyme carbonic anhydrase is found in the erythrocytes, and consists of a molecular mass of around 30000 Da. The hydration reaction catalyzed by this enzyme is reversible, and plays a vital role in the transport of CO2 from the tissues to the lungs.

H2O + CO2 ↔ H2CO3

If 20 micrograms of pure enzyme catalyzes the hydration of 0.50 g of Co2 in 1 minute, at 37 degrees Celsius, under optimal conditions, then what is the turnover number (kcat) for the carbonic anhydrase?

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