Carbonic anhydrase of erythrocytes (Mr 30,000) has one of the highest turnover numbers known. It catalyzes the reversible hydration of CO 2 : H 2 O + CO 2 ⇌ H 2 CO 3 . This is an important process in the transport of CO 2 from the tissues to the lungs. If 10.0 μg of pure carbonic anhydrase catalyzes the hydration of 0.30 g of CO 2 in 1 min at 37°C at V max , what is the turnover number ( k cat ) of carbonic anhydrase (in units of min -1 )?