Which amino acid is modified when cholera toxin activates the G-protein cascade?

Name: Which amino acid is modified when cholera toxin activates the G-protein cascade?
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Question

Quizplus · Accepted Answer

Cholera toxin activates the G-protein cascade by modifying a specific amino acid in the alpha subunit of the G protein. This modification is the addition of ADP-ribose to a specific arginine residue, which results in the constitutive activation of the G protein and the continuous production of cAMP by adenyl cyclase.

Which Amino Acid Is Modified When Cholera Toxin Activates the G-Protein