The conversion of ribulose-5-phosphate to xylulose-5-phosphate requires what enzyme?

Question

Quizplus · Accepted Answer

The conversion of ribulose-5-phosphate to xylulose-5-phosphate requires the enzyme phosphopentose epimerase. This enzyme catalyzes the isomerization of the aldopentose sugar ribulose-5-phosphate to xylulose-5-phosphate through an epimerization reaction that involves the inversion of the configuration of the C2 carbon. Phosphopentose isomerase catalyzes the interconversion of ribulose-5-phosphate and xylulose-5-phosphate but in the opposite direction. Transketolase and transaldolase are involved in the non-oxidative phase of the pentose phosphate pathway. Lactonase is not involved in this pathway.

The Conversion of Ribulose-5-Phosphate to Xylulose-5-Phosphate Requires What Enzyme