Phospholipase C Signaling Pathway ,Protein,Phospholipase C pathways is one of the major intracellular signalling pathways regulating hormones. It functions to activate inositol lipid signalling pathways causing the hydrolysis of PIP2 by PLC to IP3 and diacylglycerol to activate protein kinase C. IP3 releases calcium from the endoplasmic reticulum. PIP3 is an important regulator of AKT signaling and downstream pathways.