👉 A phospholipase is a type of enzyme that breaks down phospholipids, which are organic molecules composed of phosphatidic acid and glycerol. Phospholipids are found in many cellular membranes and play important roles in cell signaling, membrane trafficking, and energy metabolism. Phospholipases can be classified into two main types: phosphatidylserine phospholipase (PSL) and phosphatidylinositol 4,5-b