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In the article “Trafficking of Membrane-Associated Proteins to Cone Photoreceptor Outer Segments Requires the Chromophore 11- cis-Retinal” by Houbin Zhang, Jie Fan, Sha Li, Sukanya Karan, Baerbel Rohrer, Krzysztof Palczewski, Jeanne M. Frederick, Rosalie K. Crouch, and Wolfgang Baehr, which appeared on pages 4008–4014 of the April 9, 2008 issue, panels J and L of Figure 3 were identical. The correct Figure 3 is printed here.
