Figure 3.

Phylogenetic tree of SOB at species level harboring thiosulfate-oxidation related genes, including soxA, soxB, soxC, soxX, soxY, soxZ, sqr, and doxD. Orange labeled grids represent the genes positively present, while gray labeled grids represent the genes negatively present. The evolutionary history displayed on tree was inferred using the Neighbor-Joining method. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (500 replicates) are shown next to the branches.