English: Homodimeric two-pore domain potassium channel K2P2 with bound potassium ions (purple). Four helices extend away from the membrane, into the extra-cellular space. Small molecules used to stabilize the protein for crystallization are resolved in the model (black). PDB: 4TWK
Date
(upload to Wikimedia Commons), 30 June 2014 (deposition at PDB)
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