Source:http://linkedlifedata.com/resource/umls/id/C2244328
GO: Catalysis of the transfer of a single solute from one side of the membrane to the other by a mechanism involving conformational change, either by facilitated diffusion or in a membrane potential dependent process if the solute is charged. [GOC:mtg_transport, ISBN:0815340729],MSH: The passive movement of molecules exceeding the rate expected by simple diffusion. No energy is expended in the process. It is achieved by the introduction of passively diffusing molecules to an enviroment or path that is more favorable to the movement of those molecules. Examples of facilitated diffusion are passive transport of hydrophilic substances across a lipid membrane through hydrophilic pores that traverse the membrane, and the sliding of a DNA BINDING PROTEIN along a strand of DNA.,NCI: Transport of substances across a biological membrane from an area of higher concentration to an area of lower concentration by means of a carrier molecule.