[Change in the ATPase activity of glycerinated muscle fibers under the influence of urethane].

The influence of uretane on ATPase activity and contractility of frog glycerinated muscle fibers was studied. Parallel decrease of contractility and ATPase activity of glycerinated muscles takes place upon toxic uretane concentration (1.01 M). A lower uretane concentration (0.34 M) inducing considerable increase of conservation time contractive reaction maintains a higher ATPase activity than does the control one; ATPase activity of the actomyosin from these models is the same as the control one.