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Maximum likelihood phylogenetic reconstruction of translated SoxB protein sequences recovered from RG sediment cDNA, the genome of Thiobacillus sp. RG5, and reference sequences obtained from the GenBank database (in parentheses). Single-digit numbers in parentheses indicate the number of times that a given operational taxonomic unit (defined at a level of 97% amino acid sequence identity) was detected in RG sediment cDNA.
