diacylglycerol (DAG)

Diacylglycerol (DAG) is a type of lipid molecule composed of two fatty acid chains attached to a glycerol backbone. It plays a key role in cell signaling, acting as a secondary messenger that helps transmit signals inside cells, particularly in response to hormones or other stimuli. When certain receptors are activated, DAG is produced, triggering specific cellular responses such as activating enzymes or modifying cell activity. Additionally, DAG is an intermediate in the metabolism of fats and oils, involved in the breakdown and synthesis of triglycerides.