FIG. 4.

Effect of bending anisotropy (A₁ ≠ A₂) on the effectorsional stiffness at a fixed force f = 1 pN with (a) G = 0 and (b) G = 30 nm. Numerical data from Monte Carlo simulations of the triad model (points) are in good agreement with the analytical, nonperturbative predictions of Eq. (28) (solid lines). The vertical dashed lines indicate the isotropic case (ε = 0). A nonvanishing twist-bend coupling (lower panel) induces a ε → −ε symmetry breaking. Error of MonteCarlo data are smaller than symbol sizes.