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Ion channel definition

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Ion channels enable ions to flow rapidly through membranes in a thermodynamically downhill direction after an electrical or chemical impulse. Their structures usually consist of 4-6 membrane-spanning domains. This number determines the size of the pore and thus the size of the ion to be transported. See also ion pumps.


See also:

ionic migration definition
internal partial scan definition
instructional aid definition
Iodate ion definition
Inverse agonist definition