[Metabolism of ATP in rat tissues under different experimental states].

The content and incorporation intensity of tritium from methionine CH33-groups as well as ATP phosphorus renewal of the skeletal muscles, liver and brain were studied in albino rats as effected by proserin, nicotinic acid and the vagus cutting. It is established that the organs and tissues with a high metabolic activity of ATP are characterized by a higher level of its renewal of ATP. Proserin and the vagus cutting are most likely to affect the renewal of ATP through choline metabolism. Nicotinic acid may affect the renewal of ATP through pyridine nucleotides in the process of oxidative phosphorylation.