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Neighbor-joining 16S rRNA phylogenetic gene tree for candidate division Saccharibacteria. Blue (group G-1A) and red (group G-1B) are separately rooted monophyletic clades that both fall into group 1 (Camanocha and Dewhirst 2014). Blue and red bold strains are currently isolated strains and used in this study. The scale is 2.5 substitutions per site.
