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. 2014 Jun 5;6(6):1495–1513. doi: 10.1093/gbe/evu119

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© The Author(s) 2014. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 6.— — Analysis of the evolutionary history of the xaxAB locus by a comparison of topology between an Enterobacteriaceae tree and a xaxA gene tree. (A) Enterobacteriaceae phylogenetic tree based on a maximum-likelihood (ML) analysis of 12 core concatenated protein-coding sequences (infB, nusA, polA, pyrD, rpoB, valS, cysS, metK, purA, tpiA, smpB, secY). Vibrio cholerae sequences were used as the outgroup. Nodes are supported by bootstrap values of more than 93%, unless marked with an asterisk. (B) Phylogenetic tree based on ML analysis of the xaxA gene. Nodes are supported by bootstrap values of more than 86%, unless marked with an asterisk. Node A, the bacterial ancestor of the Providencia–Proteus–Photorhabdus–Xenorhabdus clade, which probably contained the xaxA gene. Node B, bacterial ancestor of the Yersinia kristensenii and Y. enterocolitica species, to which the xaxA gene was probably transferred horizontally. Crosses, probable deletions of the xaxA gene. Vibrio cholerae 16961: NC_002501; Prot. penneri ATCC35198: PRJNA54897; Prot. mirabilis HI4320: NC_010554; Arsenophonus nasoniae DSM15247: PRJNA185551; Prov. stuartii ATCC25827: PRJNA54899; Prov. rettgeri DSM1131: PRJNA55119; Prov. rustigianii DSM 4541: PRJNA55071; Prov. alcalifaciens DSM30120: PRJNA55119; Ph. luminescens TT01: NC_005126.1; Ph. asymbiotica ATCC43949: NC_012962; X. cabanillasii JM26: CBXE010000001-CBXE010000496; X. bovienii SS-2004: NC_013892; X. szentirmaii DSM16638: CBXF010000001-CBXF010000164; X. nematophila ATCC19061: NC_014228.1; X. poinarii G6: FO704551; X. doucetiae FRM16: FO704550; Y. ruckeri ATCC297473: PRJNA55249; Y. pseudotuberculosis IP31758: NC_009708; Y. pestis CO92: NC_003143; Y. intermedia ATCC29909: PRJNA54349; Y. aldovae ATCC35236: PRNJA35243; Y. mollaretii ATCC43969: PRJNA54345; Y. bercovieri ATCC43970: PRJNA54343; Y. rohdei ATCC43380: PRJNA55247; Y. frederiksenii ATCC33641: PRJNA54347; Y. kristensenii ATCC33638: PRJNA55245; Y. enterocolitica 8081: NC_008800; Serratia proteamaculans 568: NC_0098332; Se. odorifera DSM4582: PRJNA40087; Dickeya zeae 1591: NC_012912; Dickeya dadantii 586: NC_013592; Pectobacterium carotovorum PC1: NC_012917; Pe. wasabiae WPP163: NC_013421; Pe. atrosepticum SCRI1043: NC_004547; Edwarsiella tarda EIB202: NC_013508; Edwarsiella ictulari 93-146: NC_012779.2; Pantoea ananatis LMG20103: NC_013956; Erwinia billingiae At-9b: NC_014837; Er. tasmaniensis Eb661: NC_014306; Er. pyrifoliae Ep1/96: NC_02214; Er. amylovora ATCC49946: NC_013971; Klebsiella variicola At-22: NC_013850; K. pneumoniae 342: NC_011283; Salmonella enterica Typhimurium LT2: NC_003197; Sal. enterica Typhi CT18: AL513382; Escherichia albertii TW07627: PRJNA55089; Es. fergusonii ATCC35469T: NC_011740; Es. coli K12: NC_000913).