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. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Metallomics. 2009 Jan 1;1(3):207–221. doi: 10.1039/b903311d

Fig. 1.

Fig. 1

The structures of three well-characterized ureases. (A) K. aerogenes urease (PDB access code 1fwj) with UreA depicted in blue, UreB in orange, and UreC in yellow, together forming a (UreABC)3 structure. (B) H. pylori urease (1e9z) with UreA (corresponding to a fusion of the two small subunits in the K. aerogenes enzyme) depicted in blue and UreB (analogous to UreC in the K. aerogenes protein) shown in yellow for one (UreAB)3 unit, with three more (UreAB)3 units shown in gray included in the biologically relevant [(UreAB)3]4 structure. (C) Jack bean urease with one subunit (comparable to a fusion of all three K. aerogenes subunits) shown in gold in the otherwise blue hexameric protein (two trimers interacting in a face-to-face manner and shown after a 90 degree rotation compared to the other ureases). (Copied by permission of the International Union of Crystallography; http://journals.iucr.org/).