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Ligand binding screens of VanSA in the far-UV region (190-260 nm). Difference spectrum of VanSA in the absence and presence of 5-fold molar equivalent of compounds (vancomycin, teicoplanin, N-acetylmuramic acid, D-Ala-D-Ala and Ala-D-y-Glu-Lys-D-Ala-D-Ala).
