6WN6:
reference: Structure and Reaction Mechanism of YcjR, an Epimerase That Facilitates the Interconversion of d-Gulosides to d-Glucosides in Escherichia coli., Mabanglo MF, Huddleston JP, Mukherjee K, Taylor ZW, Raushel FM, Biochemistry. 2020 Jun 9;59(22):2069-2077. doi: 10.1021/acs.biochem.0c00334. Epub, 2020 May 28. PMID: 32437133

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