Effect of heat treatment on the ATPase activity of various sarcoplasmic reticulum preparations

Abstract
Ca2+-stimulated ATPase activity of sarcoplasmic reticulum (SR) preparations is activated after a short period of preincubation at temperatures between 40 and 45°C, but for temperatures higher than 48°C pronounced denaturation is observed. Heat denaturation is decreased if Mg2+ or K+ are present during heat treatment.