what does ip3 do
Second Messengers: IP 3 and DAG. Inositol triphosphate (IP3) and diacylglycerol (DAG) are important second messengers. Their formation begins with the binding of an extracellular regulatory molecule to a membrane receptor that activates a trimeric G protein.The alpha subunit of this G protein then activates phospholipase C, which acts on a membrane phospholipid.emaining in the membrane is the DAG, which consists of glycerol and two fatty acids. The IP3 diffuses to the endoplasmic reticulum, which stores Ca ++ . The IP3 binds to and opens a ligand gated ion channel that allows Ca ++ to move out into the cytosol, where the Ca ++ activates various cellular processes.