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. 2016 Feb 11;16:3. doi: 10.1186/s12900-016-0053-9

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© Xu et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Overall structure of the UspE. a Structure of EcUspE in the tetragonal crystal form, displayed as ribbons. The asymmetric unit contains two protomers colored blue and green. b Structural comparison of the cartoon traces of EcUspE and P. mirabilis USP (PDB code: 4WY2). EcUspE is colored green, and the P. mirabilis USP is colored yellow. The disordered regions are shown with dashed lines. c The monomer structure of EcUspE. d Secondary structural elements of UspE are numbered