Structure files and MD simulation trajectories were visualized and analyzed using Pythonenabled VMD 1.9.4a55 and Chimera. Python enabled VMD provides an interface to apply the numpy numerical library and plotting tools like matplotlib. To compute permeation coefficients, we rely on the inhomogeneous solubility diffusion model. To apply this method, free energy and diffusivity profiles are calculated along the representative reaction coordinate, often the membrane normal, and combined via the following equation: