BK channels (Big Potassium) also called Maxi-K or slo1 are potassium channels characterized by their large conductance of potassium ions (K+) through cell membranes. These channels are activated (opened) by changes in membrane electrical potential and/or by increases in concentration of intracellular calcium ion (Ca2+). Opening of BK channels allows K+ to passively flow through the channel down the electrochemical gradient.
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