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(A) Aromatic residues, shown as stick models, located in and around the C67–C94 Ω-loop. Hydrogen bonds are shown as dashed lines. The 1ea5 structure was used. (B) H-bond formation and cleavage between W84 and Y442, W84 and W432, and W432 and Y442. (C) The RMSF of Cα atoms of TcAChE calculated based on the 20-ns MD trajectory (black) and 47 crystal structures (red). The region of the Ω-loop (C67–C94) is highlighted in magenta.
