Fig. 3.

Full-length respiratory arsenite oxidase (AioA) sequence identified in ETNP ODZ metagenomes. (A) A maximum-likelihood tree of AioA highlighted in yellow and the closely related enzyme of unknown function arsenite oxidase-like (AioA-Like) in red-orange. Full length de novo assembled environmental sequences from the ETNP are denoted by bold text. The clade which contains the environmental AioA sequence and sequences associated with chemoautotrophic activity is designated with a bar. Bootstrap values ≥70 are shown. (B) The gene complement found along the contig AioA_ETNP_allDepths_contig_0 showing the presence of the beta subunit sequence aioB and a cytochrome-C.