Which of the following would be inhibited by a drug that specifically blocks the addition of phosphate groups to proteins?

Which of the following would be inhibited by a drug that specifically blocks the addition of phosphate groups to proteins? 




A) G-protein-linked receptor signaling
B) ligand-gated ion channel signaling
C) adenylyl cyclase activity
D) phosphatase activity
E) receptor tyrosine kinase activity




Answer: E


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