Figure 2.

stx1 Maximum Likelihood Nucleotide Phylogenetic Tree (unrooted). Bootstrap values over 50% are displayed. Pipe-delimited strain names indicate identical sequences. Dates and locations of the isolates are shown if available. The horizontal bar shows 0.001 nucleotide substitutions per site.

Lee et al. BMC Microbiology 2007 7:109   doi:10.1186/1471-2180-7-109
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