Fig. 5.

Population-wide distribution of COGs found on the PsrP-encoding island. (A) Annotated maximum-likelihood phylogeny, as displayed in Fig. 4. Reproduced from ref. 24. (B) Each column corresponds to a COG found on the PsrP-encoding island, ordered by the likely functions of each set of orthologs, which are annotated across the top and bottom. Columns connected by inverted U shapes across the top represent genes that were disrupted by frameshift or nonsense mutations in a subset of isolates: The leftmost, black line indicates the full-length, likely functional gene, whereas the brown lines indicate gene fragments generated as a consequence of disruptive mutations. Each cell in the columns corresponds to an isolate in the core-genome phylogeny; red cells indicate the presence of a COG, whereas gray cells indicate it is absent. Glycosyltransferase is abbreviated as “GTase.”