Figure 4.

dN/dS ratios of the genes within the O-antigen loci. dN/dS ratios for the genes in the O-antigen loci of all the strains were calculated using PAML package with the Nei-Gojobori method.

Hester et al. BMC Evolutionary Biology 2013 13:209   doi:10.1186/1471-2148-13-209
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