3BXV:
reference: Crystal structure studies on sulfur oxygenase reductase from Acidianus tengchongensis., Li M, Chen Z, Zhang P, Pan X, Jiang C, An X, Liu S, Chang W, Biochem Biophys Res Commun. 2008 May 9;369(3):919-23. Epub 2008 Mar 7. PMID: 18329378

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