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Ligand-binding site analysis of quorum-sensing regulators. The representation of cartoon sticks shows the contact residues of the ligand-binding site and the FASTA sequence highlighting the residues involved in ligand interactions (magenta: the h-bond-forming residues, blue: the residues within 5A of the ligand). The receptors are highlighted in slate: (A) LasR, (B) QscR, (C) CviR, (D) TraR, (E) RhlR, and (F) SdiA.
