2OU4:
reference: Crystal structures of D-tagatose 3-epimerase from Pseudomonas cichorii and its complexes with D-tagatose and D-fructose., Yoshida H, Yamada M, Nishitani T, Takada G, Izumori K, Kamitori S, J Mol Biol. 2007 Nov 23;374(2):443-53. Epub 2007 Sep 19. PMID: 17936787

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