3VT2:
reference: Crystal structure of 1,3Gal43A, an exo-beta-1,3-galactanase from Clostridium thermocellum., Jiang D, Fan J, Wang X, Zhao Y, Huang B, Liu J, Zhang XC, J Struct Biol. 2012 Dec;180(3):447-57. doi: 10.1016/j.jsb.2012.08.005. Epub 2012 , Aug 29. PMID: 22960181

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