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. 2018 Aug 14;18:402. doi: 10.1186/s12879-018-3315-2

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© The Author(s). 2018

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 — The structure of Caf1 recombinant protein expression vector p18RMAF1. The caf operon from Y. pestis encoding the structural subunit (caf1), the molecular chaperone (caf1M), the outer membrane anchor (caf1A) and the regulatory protein (caf1R) were cloned into the vector pUC18 to form p18RMAF1. (Abbreviations: Ap - ampicillin, lac - lactose)