The enzyme carboxypeptidase catalyses the hydrolysis of polypeptides and here we

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The enzyme carboxypeptidase catalyses the hydrolysis of polypeptides and here we consider its inhibition. The following results were obtained when the rate of the enzymolysis of carbobenzoxy-glycyl-D-phenylalanine (CBGP) was monitored without inhibitor, where All rates in this problem were measured with the same concentration of enzyme and are relative to the rate measured when [CBGP]_o = 0.05 mol dm^3 in the absence of inhibitor. When 1.0 X 10^-3 mol.dm-3 phenylbutyrate ion was added to a solution containing the enzyme and substrate, the following results were obtained: In a separate experiment, the effect of 5.0 x 10^2 mol.dm^-3 benzoate ion was monitored and the results were: Determine the K_m, v_max, turnover frequency, catalytic efficiency, and the mode (mechanism) of inhibition of carboxypeptidase by the phenylbutyrate ion and benzoate ion.

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