This activation causes one of its subunits to dissociate from the receptor, which then activates phospholipase C (PLC) which is found in the cell membrane. PLC in turn hydrolyzes phosphatidylinositol 4,5-bisphosphate (PIP2),which is also in the membrane, to diacyl glycerol (DAG) which stays in the membrane, and inositol 1,4,5-triphosphate (IP3), which enters the cytosol. IP3 can then dock on a calcium channel in the endoplasmic reticulum which will facilitate the release of Ca2+ into the cytosol.