Pan-genome plots of <i>Campylobacter</i>.

<p>The columns give the number of new gene families introduced with the addition of each new genome to the consideration. The curves shows the evolution of the pan genome as an accumulated sum of gene families (blue line) and the core genome (red line), as described in the <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0012253#s3" target="_blank">Methods</a>. The lower-bound estimates of the sizes of <i>the C. jejuni</i> core and pan-genomes are indicated by the dotted lines.