4XRR:
reference: Structural Characterization of CalS8, a TDP-alpha-D-Glucose Dehydrogenase Involved in Calicheamicin Aminodideoxypentose Biosynthesis., Singh S, Michalska K, Bigelow L, Endres M, Kharel MK, Babnigg G, Yennamalli RM, Bingman CA, Joachimiak A, Thorson JS, Phillips GN Jr, J Biol Chem. 2015 Oct 23;290(43):26249-58. doi: 10.1074/jbc.M115.673459. Epub, 2015 Aug 3. PMID: 26240141

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