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the protein-mediated transport of a compound across a biomembrane that is not ion-driven; a saturable transport system.
Synonym(s): passive transport
facilitated diffusionCarrier-mediated transport of a non-charged molecule down its chemical gradient via a specific membrane-integrated protein.
The movement of a substance (such as glucose) through a cell membrane along a concentration gradient with the help of membrane proteins acting as carrier molecules.
See also: diffusion