Expression
The KCNK9 gene is expressed as an ion channel more commonly known as TASK 3. This channel has a varied pattern of expression. TASK 3 is coexpressed with TASK 1 (KCNK3) in the cerebellar granule cells, locus coeruleus, motor neurons, pontine nuclei, some cells in the neocortex, habenula, olfactory bulb granule cells, and cells in the external plexiform layer of the olfactory bulb. TASK-3 channels are also expressed in the hippocampus; both on pyramidal cells and interneurons. It is thought that these channels may form heterodimers where their expressions co-localise.
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