Figure 2.

Phylogeny of Methanobrevibacter based on the 16S rRNA gene. Grey background indicates the presence of catalase (determined experimentally and/or by presence of the catalase gene). Asterisks behind species names indicate genomes where no apparent homologue of the M. arboriphilus catalase gene was detected by BLAST analysis. The tree was resampled 500 times, and only bootstrap values ≥70% are shown. The dendrogram was rooted with five Crenarchaeota sequences. The scale bar indicates 0.10 inferred nucleotide substitutions per position. M.: Methanobrevibacter.