1K2E:
reference: Structure of a Nudix protein from Pyrobaculum aerophilum reveals a dimer with two intersubunit beta-sheets., Wang S, Mura C, Sawaya MR, Cascio D, Eisenberg D, Acta Crystallogr D Biol Crystallogr 2002 Apr;58(Pt 4):571-8. PMID: 11914479

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