ADENOSINETRIPHOSPHATE-CREATINE TRANSPHOSPHORYLASE
The reversible reaction'(1) ATP+Cr=ADP+Cr-P plays an important rale in the energetics of metabolism in vertebrate muscle.Accurate thermodynamic data for both the reaction and its reactive species should therefore be an invaluable aid to a fuller understanding of cellular chemistry.In 1936, Lehmann (1) was able to study Reaction 1 free from the complicating further reaction of myokinase by a suitable choice of conditions.His equilibrium data for Reaction 1 are of the same order of magnitude as are those reported in this paper for the same pH, magnesium ion concentration,