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. 2012 Sep;78(18):6689–6703. doi: 10.1128/AEM.01259-12

Fig 3.

Fig 3

UPGMA tree of the O-antigen gene clusters from 13 O45 Escherichia coli strains. Bootstrap values are presented on the corresponding branches, and clusters are represented in parentheses. Strains with the nleB gene are highlighted in blue, highlighted in green are strains with the A base deletion in polymorphism intergenic 13340, and highlighted in red are strains with the C, A, A, T, C, C, T, G, and A STEC-associated alleles in the other nine identified polymorphisms. The unit of measure for the scale bar is the number of nucleotide substitutions per site. N/A, not available; ECRC, Escherichia coli Reference Center.