4U3A:
reference: Biochemical characterization and structural analysis of a bi-functional cellulase/xylanase from Clostridium thermocellum., Yuan SF, Wu TH, Lee HL, Hsieh HY, Lin WL, Yang B, Chang CK, Li Q, Gao J, Huang CH, Ho MC, Guo RT, Liang PH, J Biol Chem. 2015 Jan 9. pii: jbc.M114.604454. PMID: 25575592

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