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. Author manuscript; available in PMC: 2013 Sep 19.
Published in final edited form as: J Am Chem Soc. 2012 Jun 18;134(25):10706–10712. doi: 10.1021/ja304820p

Figure 3.

Figure 3

Chloride-binding site in the QM/MM optimized structure of monkey red- and green-sensitive visual pigments. Chloride ion is shown in green, His181 and Lys184 are given in yellow, water molecules in blue and retinal in red.