3II1:
reference: Structural characterization of the bifunctional glucanase-xylanase CelM2 reveals the metal effect and substrate-binding moiety., Nam KH, Lee WH, Rhee KH, Hwang KY, Biochem Biophys Res Commun. 2010 Jan 22;391(4):1726-30. Epub 2009 Dec 31. PMID: 20043877

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