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. 2016 Feb 24;5(2):e14. doi: 10.1038/emi.2016.14

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Copyright © 2016 Shanghai Shangyixun Cultural Communication Co., Ltd

This work is licensed under a Creative Commons Attribution 3.0 Unported License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/

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Maximum-likelihood phylogeny of 1082 MTB Beijing isolates. Strains shown in gray shadow represent modern Beijing sublineage while others belong to ancient Beijing sublineage. The two dark circles represent the MRCA sequences of modern Beijing strains and the closest ancient branch, respectively. Ancient Beijing strain 1-6 that harbored mutT2 G58R mutation but not IS6110 insertion in NTF region is marked in the phylogeny.