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Phylogenetic tree based on amino acid sequences of bssA and hbsA. The trees were calculated with the "One-Click" mode of the online phylogenetic analysis program Phylogeny.fr [43]. Dots represent bootstrap values between 75 and 100%. The sequences of Desulfotomaculum gibsoniae are printed in bold. Azoarcus sp. EbN1 and Geobacter sp. FRC-32 are identical to Aromatoleum aromaticum and Geobacter daltonii respectively.
