An ATP-sensitive Potassium Channel: The structure of a pancreatic K+-channel has been elucidated using Cryo-EM. The core channel consists of four identical subunits and is given in full colour, with each subunit in a different colour. A regulatory subunit (lighter colour) is attached to each core subunit. The channel displayed is oriented with the cytoplasmic side facing downwards and the extracellular side facing upwards.
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