Multiple Choice
Tyr122 is important in the mechanism of the E.coli ribonucleotide reductase.The function of this amino acid in the mechanism is to
A) carry out a nucleophilic attack on the substrate.
B) coordinate water in the active site.
C) generate the Cys439 radical species.
D) hydrogen-bond to the phosphates of the substrate.
Correct Answer:
Verified
Correct Answer:
Verified
Q2: During the biosynthesis of UMP from carbamoyl
Q3: Contrast the source of the nitrogen required
Q4: The activity site of ribonucleotide reductase can
Q5: Two biosynthesis steps are necessary to incorporate
Q6: Consider the breakdown of the four compounds
Q7: To determine the role of glutaredoxin in
Q8: Several cysteines play important roles in the
Q9: Analysis of enzyme activities in a cell
Q10: Glutamine-PRPP amidotransferase is a tetrameric enzyme that
Q11: Analysis of AMP and GMP synthesized in