نتایج جستجو برای: k channels
تعداد نتایج: 500256 فیلتر نتایج به سال:
Patch clamp recordings carried out in the inside-out configuration revealed activity of three kinds of channels: nonselective cation channels, small-conductance K(+) channels, and large-conductance anion channels. The nonselective cation channels did not distinguish between Na(+) and K(+). The unitary conductance of these channels reached 28 pS in a symmetrical concentration of 200 mM NaCl. A l...
Background: Two-pore domain K channels mediate background K conductance and regulate cellular function. Results: Low extracellular pH (pHo) significantly increases the Na to K relative permeability of TWIK-1, TASK-1, and TASK-3 K channels. Conclusion: TWIK-1, TASK-1, and TASK-3 channels change ion selectivity in lowered pHo. Significance: The findings provide insights on the mechanism of regula...
Membrane voltage controls the passage of ions through voltage-gated K (K(v)) channels, and many studies have demonstrated that this is accomplished by a physical gate located at the cytoplasmic end of the pore. Critical to this determination were the findings that quaternary ammonium ions and certain peptides have access to their internal pore-blocking sites only when the channel gates are open...
ATP-sensitive potassium channels (K(ATP) channels) regulate cell excitability in response to metabolic changes. K(ATP) channels are formed as a complex of a sulfonylurea receptor (SURx), a member of the ATP-binding cassette protein family, and an inward rectifier K(+) channel subunit (Kir6.x). Membrane phospholipids, in particular phosphatidylinositol (PI) 4,5-bisphosphate (PIP(2)), activate K(...
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