2WCV:
reference: Crystal structures and enzyme mechanisms of a dual fucose mutarotase/ribose pyranase., Lee KH, Ryu KS, Kim MS, Suh HY, Ku B, Song YL, Ko S, Lee W, Oh BH, J Mol Biol. 2009 Aug 7;391(1):178-91. Epub 2009 Jun 11. PMID: 19524593

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