5HHF:
reference: In Crystallo Capture of a Covalent Intermediate in the UDP-Galactopyranose Mutase Reaction., Mehra-Chaudhary R, Dai Y, Sobrado P, Tanner JJ, Biochemistry. 2016 Feb 16;55(6):833-6. doi: 10.1021/acs.biochem.6b00035. Epub, 2016 Feb 4. PMID: 26836146

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