Abstract:A skeletal muscle membrane fraction enriched in sarcoplasmic reticulum (SR) contained Ca2+-ATPase activity which was stimulated in vitro in normal chickens (line 412) by 6 nM purified bovine calmodulin (33% increase over control, P less than 0.001). In contrast, striated muscle from chickens (line 413) affected with an inherited form of muscular dystrophy, but otherwise genetically similar to line 412, contained SR-enriched Ca2+-ATPase activity which was resistant to stimulation in vitro by calmodulin. Basal l… Show more
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