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Three-dimensional structure and TMD aromatics in ELIC, GLIC, and the Torpedo nAChR. A, three-dimensional structures of ELIC (2VLO; left), GLIC (3EAM; center), and the Torpedo nAChR (2BG9; right) colored to highlight the functional agonist binding (red), transmembrane gating (blue), and cytoplasmic (green) domains. B, side and top views of a single TMD from each pLGIC (α-subunit for the nAChR) highlighting aromatic residues at the M4-M1/M3 interface as yellow sticks.
