1,2-Diacylglycerols (DAGs) are formed in cells through the hydrolysis of phospatidyliositol 4,5-bisphosphate by phospholipase C. They have important roles in signal transduction, as in their activation of some isoforms of PKC. In addition, DAGs are modified by DAG kinases, reducing signaling through DAG while generating bioactive phosphatidic acids. 1,2-Distearoyl-sn-glycerol is a form of DAG containing the saturated long-chain (18:0) stearic acid at both the sn-1 and the sn-2 position.
