Whole-genome phylogeny of Escherichia coli/Shigella group by feature frequency profiles (FFPs)

Two phylogenies that accentuate different aspects of E. coli/Shigella genomic evolution are presented, one based on the compositions of all possible features of length l = 24 (∼8.4 million features), which are likely to reveal the phenetic grouping and relationship among the organisms and the other based onThe compositions of core features with low frequency and low variability, which account for ∼69% of all commonly shared features among 38 taxa examined.