4NOV:
reference: Structural analysis of the GH43 enzyme Xsa43E from Butyrivibrio proteoclasticus., Till M, Goldstone D, Card G, Attwood GT, Moon CD, Arcus VL, Acta Crystallogr F Struct Biol Commun. 2014 Sep 1;70(Pt 9):1193-8. doi:, 10.1107/S2053230X14014745. Epub 2014 Aug 29. PMID: 25195890

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