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Phylogenetic trees based on different gene selections. (a) Phylogenetic tree of 13 bacterial species based on CTP synthase (pyrG) affiliates with Bacteroidates; (b) phylogenetic tree of 13 bacterial species based on glyA affiliates with Chlorobi; (c) phylogenetic tree of 13 bacterial species based on Chaperonim Hsp 60 (groEL) affiliates with the superphylum Bacteroidates-Chlorobi. (d) phylogenetic tree of 13 bacterial species based on the whole-genome gene sets.
