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16S rRNA-based phylogeny of sponge-associated Cyanobacteria. The tree was inferred and drawn as explained in the legend to Fig. 3. Labels in boldface represent A. fulva-derived Cyanobacteria sequences obtained in the present study. The accession numbers of the sequences obtained from the public databank are given in parentheses. There were a total of 612 aligned nucleotide positions in the final data set.
