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CrystalMaker drawing of the crystallographic structural model for the active site obtained for B. pasteurii urease complexed with β-mercaptoethanol (BME) (PDB code 1UBP). The nickel ions are represented in gray, while CPK coloring is used for all other atoms. Hydrogen bonds are shown as thin blue lines. The BPU residue-numbering scheme (all residues belonging to the α subunit) is used. The residue indicated with the letter “K” is the carbamylated lysine.
