Figure 2

Comparison of 16S rRNA and reductive DsrAB trees. The strict consensus trees are based on corresponding sequence pairs of 16S rRNA and reductive DsrAB from 254 pure cultures and genomes. 16S rRNA and DsrAB trees were calculated using a 50% conservation filter for bacteria (1222 nucleotide positions) and an indel filter for reductive-type DsrAB (530 amino-acid positions), respectively. Scale bars indicate 10% sequence divergence. Both trees are collapsed at the family, genus or (in case of Desulfotomaculum) subcluster level. Sequences that branch inconsistently between the trees are marked with an asterisk. Bootstrap support (100 resamplings) is shown by split circles (top: maximum parsimony; bottom left: maximum likelihood; bottom right: neighbor joining) at the respective branches, with black, gray and white/absence indicating ⩾90%, 70%–90% and <70% support, respectively.