This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O2 as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases). The oxygen incorporated need not be derived from O2. The systematic name of this enzyme class is sulfur:oxygen oxidoreductase (hydrogen-sulfide- and sulfite-forming). Other names in common use include SOR, sulfur oxygenase, and sulfur oxygenase reductase.
Sun CW, Chen ZW, He ZG, Zhou PJ, Liu SJ (2003). "Purification and properties of the sulfur oxygenase/reductase from the acidothermophilic archaeon, Acidianus strain S5". Extremophiles. 7 (2): 131–4. PMID12664265. doi:10.1007/s00792-002-0304-5.