Biochemistry 4th Edition by Reginald Garrett, Charles Grisham

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Analyzing the action of a muscle contraction inhibitor
An ATP analog, , -methylene-ATP, in which a -CH₂ - group replaces the oxygen atom between the - and - phosphorus atoms, is a potent inhibitor of muscle contraction. At which step in the contraction cycle would you expect , -methylene-ATP to block contraction