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Effect of magnesium binding to site III and IV of cTnC on the relative activation of myofibrillar ATPase by NEM-S1. The % activation was calculated from data in figures 1 and 2 using the equation:
%Activation =(ANEM-S1/A − 1)× 100,
where A and ANEM-S1 are the ATPase activities in the absence and presence of NEM-S1, respectively at each free [Ca2+].
