Phylogenetic trees of RhlA and RhlB homologs. Phylogenetic trees of RhlA and RhlB homologs. Radial (unrooted) neighbor-joining phylogenies of representative RhlA (A) and RhlB (B) homologs, constructed using the Jones-Taylor-Thornton amino acid model, with complete gap deletion. Only bootstrap values greater than 70% are shown. In addition to the P. ananatis strains used in this study, other representative taxa included Burkholderia cenocepacia H111 (CDN64069), Burkholderia glumae BGR1 (ACR31008), Burkholderia pseudomallei 1106a (ABN94800), Dickeya dadantii 3937 (YP_003882762), Lonsdalea quercina (WP_026742016), Pantoea stewartii subsp. stewartii DC283 (EHU02365), Pseudomonas aeruginosa PAO1 (NP_252169), and Serratia marcescens FGI94 (AGB82844). Derek D. N. Smith et al. mSphere 2016; doi:10.1128/mSphere.00075-15