What did earl Sutherland received the Nobel prize for his discovery of cAMP?

Earl Sutherland received the Nobel Prize in Physiology or Medicine in 1971 for his discovery of cyclic adenosine monophosphate (cAMP) and its role as a "second messenger" in cell signaling, which revolutionized our understanding of how cells communicate with each other. His research laid the foundation for the field of signal transduction and its importance in regulating various physiological processes in the body.