Summary of parameters of the optimum myosin filament models.

Parameters used to define the azimuthal orientation of myosin crossbridges on the thick filament in the model calculation. The first column identifies the parameters used in the modeling; ε, the rotation angle of a head about the z-axis and rh, the helical radius of a head where subscripts (r, p) denote those for the regular and perturbed regions, respectively. φ, “is the” azimuthal rotation angle of a myosin crossbridge in the perturbed region where subscripts (1, 2, 3) correspond to crown levels 1, 2 and 3 in Figs. 6B and H. The second and third columns identify the parameter values for the full-filament overlap and non-filament overlap models, respectively. The paired heads of a single myosin crossbridge are denoted as a red head and a purple head.