FIG 5 .

NanA phylogeny. A phylogenetic tree of NanA is shown. The tree was constructed using the neighbor-joining tree method and the p-distance model of evolutionary distances as parameters and MEGA6 (75–77). Letters indicate major bacterial phyla present in the corresponding NanA clade. Colors indicate the major phylogenetic groups that contain nanA. Red, Actinobacteria; purple, Bacteroidetes; lime green, Firmicutes; dark green, Fusobacteria; dark red, Planctomycetes; blue, Proteobacteria; yellow, eukaryotes; gray, Spirochaetes.