3FW6:
reference: Crystal structure of CelM2, a bifunctional glucanase-xylanase protein from a metagenome library., Nam KH, Kim SJ, Hwang KY, Biochem Biophys Res Commun. 2009 May 29;383(2):183-6. Epub 2009 Apr 2. PMID: 19345197

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