Figure 4
From: Insights and inferences about integron evolution from genomic data
The ratio of non-synonymous to synonymous mutations over the integrase sequence for Vibrio (A) from clade 7 and Shewanella (B) from clade 10. Proteins were aligned in MAFFT [58] and used to generate a DNA alignment. DNA alignments were used to generate pairwise comparisons with the Vibrio cholerae intI (A), or Shewanella oneidensis intI (B) and the ratio of nonsynonymous and synonymous substitutions at each codon position was calculated. The figure legends show a consensus cladogram (maximum likelihood, maximum parsimony and distance) for the integrase genes.