Fig. 4.

Plots of meridian, parallel and mean curvature vs. x for a fusion pore with R_p = 2.5 nm and R_b = 3 nm. ${\mathit{\text{E}}}_{\text{b}}^{\ast }=66.23kT$ (single-contour bilayer). Meridian curvature was calculated from Eq. 12 with a = 1.828, b = 0.0245, c = 0.359 and s_max = 7.722. Parallel curvature was calculated from Eq. 8. The mean curvature was the arithmetic mean of the parallel and meridian curvatures