Dependence of filling [F(%)] of the pore on hydrodynamic diameter of nonelectrolytes. The solid lines are visual guides. NEs were ordered according to their size (from left to right), namely, glycerol, arabinose, sorbitol, maltose, PEG 300, PEG 400, and PEG 1000. For calculation of F(%), see “Determination of the pore size” below.