English: Cartoon ribbon representation of the Archaerhodopsin-3 photoreceptor protein from Halorubrum sodomense, showing the peptide backbone (pink) and retinylidene chromophore (white). The extracellular face of the protein is at the bottom of the picture.
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Captions
Archaerhodopsin-3 protein (pink) showing the retinylidene chromophore (white)