Adenosine 5'-triphosphate (ATP) is a substrate of many kinases involved in cell signaling and of adenylate cyclases. ATP provides the metabolic energy to drive metabolic pumps. It serves as a coenzyme in a wide array of enzymatic reactions and is used for tissue preparation. Adenosine 5'-triphosphate (ATP) is a substrate of many kinases involved in cell signaling and of adenylate cyclases. ATP provides the metabolic energy to drive metabolic pumps. It serves as a coenzyme in a wide array of enzymatic reactions and is used for tissue preparation.