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Phylogenetic trees for representative RND transporters. According to the COBALT program, the trees were constructed using the Fast evolution method and rendered with (A) Rectangle and (B) Radical. Protein names are abbreviated; for example, “MexY_PAER” stands for “MexY of P. aeruginosa.”Accession numbers are shown in parentheses. The four branches shown in red are: (a) MexY, (b) MexD, (c) MexB, and (d) MexF.
