Figure 2.

Distribution of unique core genomes. The number of homology clusters and isolates included in each determined unique core genome are shown. Given that at least one gene of each isolate has to be included in a homology cluster of a unique core genome, the number of homology clusters denotes the minimum number of different genes per isolate included in a unique core genome. Black circles represent unique core genomes including 10 or less homology clusters of any group of isolates. Unique core genomes including more than 10 homology clusters are colored according to the legend. Hence that for better visibility, the scaling factor changes for unique core genomes enclosing more than 50 homology cluster.

Kahlke et al. BMC Genomics 2012 13:179   doi:10.1186/1471-2164-13-179
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