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    Does extrinsic protein help in facilitated diffusion???if yes than plz explain how...
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    (Original post by Komal Desai)
    Does extrinsic protein help in facilitated diffusion???if yes than plz explain how...
    No, extrinsic proteins are found on only one side of the membrane (i.e. cytosolic or extracellular membrane). Intrinsic proteins (i.e. those that have transmembrane domains, meaning they span the entire membrane) are involved in facilitated diffusion. The proteins involved in facilitated diffusion may be channel proteins (such as sodium/potassium channels) which have a pore, allowing substances to cross the membrane, or carrier proteins/transporters, which change shape/conformation, allowing substances to cross the membrane. Facilitated diffusion always requires a concentration gradient, and the process is passive in contrast to active transport which uses energy to pump ions/molecules against their concentration gradient.
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    I know these but I am talking of those one which are partially burried.
 
 
 
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