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KCNK9
Potassium channel subfamily K member 9 is a protein that in humans is encoded by the ''KCNK9'' gene.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=51305 )〕
This gene encodes K2P9.1, one of the members of the superfamily of potassium channel proteins containing two pore-forming P domains. This open channel is highly expressed in the cerebellum. It is inhibited by extracellular acidification and arachidonic acid, and strongly inhibited by phorbol 12-myristate 13-acetate.〔 Phorbol 12-myristate 13-acetate is also known as 12-''O''-tetradecanoylphorbol-13-acetate (TPA).
==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.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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