title: Asymmetry in biological permeability barriers with carrier transport.
mesh_terms: D001692:Biological Transport; D002463:Cell Membrane Permeability; D004058:Diffusion; D046911:Macromolecular Substances; D008433:Mathematics; D008566:Membranes; D008956:Models, Chemical
chemical_list: D046911:Macromolecular Substances