1MI3:
reference: Structure of xylose reductase bound to NAD+ and the basis for single and dual co-substrate specificity in family 2 aldo-keto reductases., Kavanagh KL, Klimacek M, Nidetzky B, Wilson DK, Biochem J 2003 Jul 15;373(Pt 2):319-26. PMID: 12733986

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