Differential effects of temperature on a membrane adenosine triphosphatase and associated phosphatase

Abstract

Arrhenius plots of a membrane (Na++K+) dependent ATPase (adenosine triphosphatase) activity showed characteristic discontinuities, whereas those of the associated K+ dependent phosphatase activity did not. These findings support the contention that the phosphatase activity does not depend on phospholipid in the same way as does the ATPase activity.