Patterns of internal and external tetraethylammonium block in four homologous K+ channels.


Tetraethylammonium (TEA) is a small ion that is thought to block open K+ channels by binding either to an internal or to an external site. For this reason, it has been used to probe the ion conduction pathway or pore of K+ channel mutants and a K+ channel chimera. The results suggested that the region between transmembrane segments 5 and 6 (S5-S6 linker… (More)


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