3SO2:
reference: Crystallization of Chlorella deoxyuridine triphosphatase., Badalucco L, Poudel I, Yamanishi M, Natarajan C, Moriyama H, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Dec 1;67(Pt 12):1599-602. , Epub 2011 Nov 26. PMID: 22139176

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