Protein Structure from Scientific Research

Left, structural superposition of the ligand-free GPR20-Gi, galanin-bound GAL1R-Gi (PDB 7WQ3) and galanin-bound GAL2R-Gq (PDB 7WQ4) structures. Right, magnified view of the N-terminal cap of GPR20 (gray), galanin in GAL1R (green) and galanin in GAL2R (purple). Key residues are shown as sticks.

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