Potassium channels and pumps have been identified and shown to function in the uptake of ions and opening of stomatal apertures (Figure 2).
The closure of the Potassium channels causes Depolarization of the cell membrane causing the cell membrane to stretch which causes the voltage-gated Calcium channel on the membrane to open causing an influx of Ca2+ ions.
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There have been many suggestions to what this might be, the sarcolemmal ATP-sensitive potassium channel, the mitochondrial ATP-sensitive potassium channel, the mitochondrial permeability transition pore, reactive oxygen species generation, chloride channels, the inward rectifier potassium ion channel and connexon 43 related channels.
This gene encodes a membrane protein that has sequence similarity to the KCNE1 gene product, a member of the potassium channel, voltage-gated, isk-related subfamily.
Furthermore, MLC1 has highest homology with the KCNA1 shaker-related voltage-gated potassium channel (Kv1.1).