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Neighbor-joining phylogenetic tree of 16S rRNA gene sequences. Cockroach bacterial clones from SB (fed on sugarcane bagasse), C (fed on cellulose) or W (wild-types). Reference sequences were retrieved from Genbank (in bold). Phylogenetic trees were constructed for P. americana gut 16S rRNA bacterial sequences with reference sequences from GenBank by the neighbor-joining algorithm based on distances calculated by the Kimura-2 method.
