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. 2013 Oct 24;5(11):2109–2123. doi: 10.1093/gbe/evt159

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Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution 2013. This work is written by US Government employees and is in the public domain in the US.

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Fig. 1.— — Phylogenetic tree based on the maximum-likelihood method implemented in RAxML. Bold black branches represent 90–100% bootstrap support. Bold gray branches represent 70–90% bootstrap support. Numbers associated with branches are SNPs unique to that lineage. For the purposes of this figure, the long outgroup branches were shortened; however, the original tree is available for download at TreeBase.org. Three antigen characters are mapped onto this phylogeny: O group, Phase 1 (H) flagellar antigen, and Phase 2 (H) flagellar antigen.