A hormone binds a receptor and activates the cAMP signal transduction pathway ultimately leading to the cell response. If you wanted to develop a drug to block this pathway, the drug would need to inhibit _____
A. hormone release from the receptor.
B. adenylyl cyclase.
C. protein phosphatases remove phosphates from proteins initially activated by protein kinase A.
D. GTP on the alpha subunit of the G protein being hydrolyzed to GDP.
E. phosphodiesterase.
B. adenylyl cyclase.
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