Abstract
Both CO2 fixation studies and measurement of adenylate phosphate end products indicated an adenylate kinase to be the mechanism whereby adenosinetriphosphate was formed from adenosinediphosphate. Inorganic phosphate, glucose-6-phosphate, acetyl phosphate, and creatinophosphate were inactive phosphorylating agents. The results also indicated a number of phosphatases to be present in the system.