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Comparison of the Ras-like domain orientation in the different ternary complex structures of rhodopsin–Gi and β2AR–Gs (PDB ID code 3SN6). Sites in the Ras-like domain of Gαi used for distance mapping are shown as orange spheres of the Cα atoms. Corresponding residues in Gαs (orange) are indicated with Gαi numbering in parentheses to guide the eye in assessing the magnitude of structural differences.
