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(a) Stereoview of motion corresponding to mode 4 in absence of ATP. (b) Stereoview of motion corresponding to mode 5 in absence of ATP. (c) Stereoview of motion corresponding to mode 4 in presence of bound ATP. ATP is shown in a ball-and-stick model. (d) Stereoview of motion corresponding to mode 2 of the isolated equatorial domain without ATP. The helices with significant twisting motion are shown. The drawings were made with molscript (45).
