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  • Title: Localization of light-induced conformational changes in bovine rhodopsin.
    Author: Pellicone C, Nullans G, Virmaux N.
    Journal: FEBS Lett; 1985 Feb 11; 181(1):179-83. PubMed ID: 3156050.
    Abstract:
    Conformational changes in the extradiscal regions of rhodopsin induced by illumination were investigated by modifying the visual pigment by mild treatment with cyanogen bromide prior to and after light exposure. Light induced an increased yield of cleavage of the Met bond 253-254 and a new cleavage at the Met bond 155-156 of the rhodopsin polypeptide chain. These residues, located at the beginnings of the membrane-buried helices 6 and 4, respectively, were concluded to become extradiscally exposed upon illumination.
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