問題詳情

43. In the citric acid cycle, succinate is dehydrogenated by succinate dehydrogenase, which yields fumarate. Thedehydrogenation of two of the four hydrogens in succinate (labeled as H1~H4 in the figure shown below) isstereospecific, with the pro-S hydrogen removed from one carbon atom and the pro-R hydrogen removed from theother.
  

Which of the following two hydrogens could be abstracted in the four hydrogens of the succinate molecule in thereaction catalyzed by succinate dehydrogenase?a. H1 and H2 b. H1 and H3 c. H1 and H4 d. H2 and H3e. H2 and H4 f. H3 and H4
(A) b and e
(B) c and d
(C) a and f
(D) Only c could occur.
(E) Only d could occur.

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增