Chapter 23: Q3P (page 1071)
What is the product of the following reaction?
Chapter 23: Q3P (page 1071)
What is the product of the following reaction?
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Get started for freeAcetolactatesynthasetransfers the acyl group of pyruvate to \(\alpha \)-ketobutyrate. This is the first step in the biosynthesis of the amino acid isoleucine. Propose a mechanism for this reaction.
Question: Answer the following:
a. What coenzyme transfers an acyl group from one substrate to another?
b. What is the function of FAD in the pyruvate dehydrogenase complex?
c. What is the function of NAD+ in the pyruvate dehydrogenase complex?
d. What reaction necessary for proper blood clotting is catalyzed by vitamin KH2?
e. What coenzymes are used for decarboxylation reactions?
f. What kinds of substrates do the decarboxylating coenzymes work on?
g. What coenzymes are used for carboxylation reactions?
h.What kinds of substrates do the carboxylating coenzymes work on?
Question: Propose a mechanism for the following reaction:
Nonenzyme-bound FAD is a stronger oxidizing agent than . How, then, can oxidize the reduced flavoenzyme in the pyruvate dehydrogenase
complex?
The enzyme that catalyzes the bond cleavage reaction that converts serine to glycine removes the substituent (R) bonded to the \(\alpha \)-carbon in the first step of the reaction. Starting with PLP bound to serine in an imine linkage, propose a mechanism for this reaction. (Hint:The first step involves removal of the proton from serine’s OH group.)
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