Fig. 2

Neighbor-joining tree representing the phylogenetic relationship of putative α-subunits of oxygenase components of ROs obtained from thermophilic bacteria (orange font) with homologous sequences from other bacteria and eukaryotes. Each entry is represented by the corresponding protein name or locus tag, followed by the accession number (within parentheses) and the strain name. Values at each node indicate the level of bootstrap support based on 100 resampled datasets, while bootstrap values below 60% are not shown. The bar represents 0.1 substitutions per amino acid. The sequences have been clustered according to similarity class as defined in Chakraborty et al. (2014)