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Neighbor-joining tree based on Jukes–Cantor corrected DNA distances showing the phylogenetic affiliation of bacterial 16S rRNA gene sequences from activated sludge of CSTR and reference sequences from other environmental samples or pure stains. The sequences obtained in this study are printed in bold. All the sequences were grouped as I Planctomycetales, II Chloroflexi, III Bacteroidetes, and IV Proteobacteria
