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(a) The result of numerical calculation of the integral Equation (6) plotted as a universal function of parameter γ. The solid line drawn through these points is the analytical expression Equation (7); (b) Plots of the filament free energy, Equation (8), for several vaues of stiffness parameter c labelled on the plot. The arrows point at the force-free filament extension that occur for stiffer filaments with .
