Which of the following catalyzes ADP-ribosylation of a diphthamide residue?
(a) Chloramphenicol
(b) Cycloheximide
(c) Diphtheria toxin
(d) Ricin
I had been asked this question in an international level competition.
This interesting question is from Protein Synthesis topic in division DNA, RNA and Protein Metabolism of Biochemistry