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Figure 2 | Genome Biology

Figure 2

From: Reduced selection leads to accelerated gene loss in Shigella

Figure 2

Genes are lost at an accelerated rate along branches that lead towards Shigella strains. Plotted is the number of genes lost along the branches of the phylogenetic tree against the average dS along the same branches. Red circles represent branches that lead towards Shigella strains. Blue squares represent branches that lead towards pathogenic E. coli strains. The red line represents the fitted Poisson model for the Shigella branches. The blue line represents the same for the pathogenic E. coli branches. The yellow diamond represents the branch that leads towards the direct ancestor of the EHEC strains and of S. dysenteriae. The blue square that is enclosed by a rectangle represents the branch that leads from the ancestor of the EHEC strains and S. dysenteriae to the ancestor of the two EHEC strains. The red circle that is enclosed by a rectangle represents the branch leading from the same ancestor towards S. dysneteriae.

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