So let's begin with Epinephrine signaling. So in Epinephrine signaling, we said that once a specific protein, the G alpha protein, binds until adenolate cyclists. It stimulates Adenon cyclists to transform ATP into C amp. And Camp is that secondary messenger used by the Epinephrine signaling. What it does is it binds into protein kinase A and it activates protein kinase A. Now, for the case of the phosphoride, so that's actually spelled incorrectly.