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Phylogenetic analysis of BA type and BA–AA type OTUs. The phylogenetic tree was constructed by the neighbor-joining method using the sequences of V3–V4 region of the 16S rRNA gene. Colored OTUs represent BA–AA type. Closest species was identified by homology search of the partial 16S rRNA sequence to EZ biocloud type strain database. Sequence similarities < 97% is marked by asterisk.
