About the structure and biological function of DAG Structure. Diacylglycerols (diglycerides, DAG, or DG) belong to the group of glycerol esters within the glycerolipids. Their structure consists of a glycerol backbone linked to two fatty acids. The fatty acids can be of variable length, hydroxylated, and contain double bonds. Function. Diacylglycerols have different biological functions, … Continue reading Diacylglycerol