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4fur is a 6 chain structure with sequence from Brucella abortus 2308. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Sangari FJ, Seoane A, Rodriguez MC, Aguero J, Garcia Lobo JM. Characterization of the urease operon of Brucella abortus and assessment of its role in virulence of the bacterium. Infect Immun. 2007 Feb;75(2):774-80. Epub 2006 Nov 13. PMID:17101645 doi:http://dx.doi.org/IAI.01244-06