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Neighbor joining tree of Chloroflexi-related nearly full-length 16S rRNA sequences from cDNA samples BN (SIUS) and EN (SIUT). Elkhorn Slough mat sequences group with sequences retrieved from other microbial mat sites and are only distantly related with cultured Chloroflexi. Bootstrap values calculated with the PhyML algorithm that were ⩾50% are displayed in the tree. Scale bar represents 10% estimated sequence divergence.
