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CrystalMaker drawing of the crystallographic structural model for the active site obtained for B. pasteurii urease complexed with diaminophosphate (DAP) (PDB code 3UBP). The nickel ions are represented in gray and phosphorus is in orange, 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.
