Phospholipase C: An enzyme that catalyzes the hydrolysis of phosphatidylinositol 4,5-bisphosphate into diacylglycerol and inositol trisphosphate, acting as a key player in cell signaling.
Protein kinase C (PKC): An enzyme activated by DAG that phosphorylates various target proteins, leading to changes in their activity and altering cell functions such as gene expression, metabolism, and membrane transport.
Secondary messenger: A molecule that transmits signals from receptors on the cell surface to target molecules inside the cell, playing a crucial role in amplifying and spreading cellular signals