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The active site of ObcA in an oxaloacetate bound form. a, the stereo view of the active site of ObcA in complex with oxaloacetate (yellow) is shown. The dashed line between Tyr322 and the C3 group of oxaloacetate does not represent a hydrogen bond. Oxaloacetate in the right panel of (a) is overlaid with an Fo − Fc map contoured at 2.3 σ. b, the respective interactions are displayed. Dashed lines with an interatomic distance indicate possible hydrogen bonds.
