How Can Signaling Through Second Messagnger Camp Be Turned Off?

How Can Signaling Through Second Messagnger Camp Be Turned Off? cAMP signaling is turned off by enzymes called phosphodiesterases, which break the ring of cAMP and turn it into adenosine monophosphate (AMP). Which is one way that a signal transduction pathway can be turned off? The most obvious method for turning off a signal is