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Stereo diagram of residues in the putative active site of XcTcmJ from X. campestris pv. campestris. The C, O, N and Se (from selenomethionine) atoms of the side chains of XcTcmJ and the bound acetate ligand (labeled ACT) are shown in green, red, blue and orange, respectively. The bound Zn atom and water molecules are shown as orange and red spheres, respectively. His41, Gln46 and His80, which are within coordination distance of the bound zinc, are labeled in italics.
