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Positioning of the aromatic residues in Pil Bac1 . A: Overall alignment in the pilus. B, C: Magnified view on pilus subunits. The aromatic residues are shown as sphere representation in blue. Round, red arrows show the shortest distances between two neighboring aromatics. The distances between the individual aromatics are shown in Å on the side and the distance between two clusters is shown in Å in red. e-: electron.
