FIG 2.

Sequence variation within the gene encoding the outer membrane protein HPU229254_07240. (A) SNP density (calculated through DnaSP) based on the nucleotide alignment of the sequences of the five H. pullorum strains under study. (B) Analysis of dN (number of nonsynonymous substitutions per nonsynonymous site) and dS (number of synonymous substitutions per synonymous site) over the same alignment (using SWAAP). Step size was adjusted according to software specificities and to improve visualization.