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Chapter 11: Q4. (page 327)
Why are cofactors required for some enzymatic reactions?
Cofactors are required for oxidation-reduction reaction and group transfer processes which are not facilitated by functional groups of proteins.
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Describe the experimental evidence that鈥檚 upports lysozyme鈥檚 catalysis by acid-base catalysis, covalent catalysis, andtransition state stabilization.
Urease, the first enzyme to be crystallized, is inhibited in the presence of Hg, Cd, or Co ions. What does this information suggest about the catalytic mechanism of urease?
Suggest a transition state analog for proline racemase that differs from those discussed in the text. Justify your suggestion.
The covalent catalytic mechanism of an enzyme depends on a single active site Cys whose pK is 8. A mutation in a nearby residue alters the microenvironment so that this pK increases to 10. Would the mutation cause the reaction rate to increase or decrease? Explain.
Tofu (bean curd), a high-protein soybean product, is prepared in such a way as to remove the trypsin inhibitor present in soybeans. Explain the reason(s) for this treatment
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