In the G protein-coupled signal transduction pathway, phosphatases are responsible for the inactivation of:
A)the alpha subunit of a G protein.
B)protein kinase A.
C)adenylyl cyclase.
D)the protein target activated by protein kinase A.
E)All of these choices are correct.

Question

Quizplus · Accepted Answer

Phosphatases remove phosphate groups from proteins, thereby inactivating the protein targets that were activated by phosphorylation, such as those activated by protein kinase A.

In the G Protein-Coupled Signal Transduction Pathway, Phosphatases Are Responsible