English: Halobacterium salinarum bacteriorhodopsin trimer viewed from the cytoplasm. A single protomer is highlighted red and each protomer is bound to retinal (black) via lysine 216. Lipids facilitating protein crystallization are coloured grey. PDB 6RQP
Date
(upload to Wikimedia Commons), 16 May 2019 (deposition at PDB)
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Captions
Halobacterium salinarum bacteriorhodopsin trimer viewed from the cyoplasm. PDB 6RQP