Which of the following toxin does not have ADP-ribosylation activity?

Which of the following toxin does not have ADP-ribosylation activity? Correct Answer Botulinum toxin A

Botulinum toxin A does not have ADP-ribosylation activity. Pertussis toxin, Cholera toxin, and E. coli heat-labile toxins have ADP-ribosylation activity. In the ADP-ribosylation reaction, the toxins bind NAD and transfer the ADP-ribose moiety to the major target protein.
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