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Comparison of CDT subunits. (A) Percent identity matrix of CdtB subunits of E. coli (type I to V), S. dysenteriae, S. boydii, P. alcalifaciens, E. albertii, and Salmonella Typhi; identity score >89% are shown in bold. (B) Phylogenetic tree of CdtB subunits, with real branch length. Brackets indicate an identity score >89%. (C) Percent identity matrix of CdtA and CdtC subunits; identity score >84% are shown in bold.
