Source: http://www.asmscience.org/content/book/10.1128/9781555817114.ch17
Timestamp: 2019-04-24 12:11:52+00:00

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Minimum evolution tree showing the phylogenetic relationships among 39 SNP genotypes (SGs) of E. coli O157:H7. Numbers at the nodes are the bootstrap confidence values that mark nine distinct clusters, or clades. The gray line separates strains with ancestral traits (GUD+, SOR+) from those with derived traits (GUD–, SOR–). Illustration created by Thomas S. Whittam, 2007.
Relative differences in gene expression between clades 8 and 2 of E. coli O157:H7, as detected by quantitative PCR.
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