ATP - 13 C 10 (Adenosine 5'-triphosphate- 13 C 10 ) dilithium is 13 C-labeled ATP. ATP (Adenosine 5'-triphosphate) is a central component of energy storage and metabolism in vivo. ATP provides the metabolic energy to drive metabolic pumps and serves as a coenzyme in cells. ATP is an important endogenous signaling molecule in immunity and inflammation.