Several cysteines play important roles in the mechanism of E.coli ribonucleotide reductase.Which is NOT a role carried out by cysteine in this enzyme?
A) donation of a hydrogen atom to the substrate
B) removal of a hydrogen atom from the substrate
C) donation of a proton to ultimately form water
D) reduction of thioredoxin

Question

Quizplus · Accepted Answer

Cysteines play important roles in the mechanism of E.coli ribonucleotide reductase such as donation of a hydrogen atom to the substrate, removal of a hydrogen atom from the substrate, and donation of a proton to ultimately form water. However, cysteines are not involved in the reduction of thioredoxin.

Several Cysteines Play Important Roles in the Mechanism of E