6IXM:
reference: Structure-guided engineering of ChKRED20 from Chryseobacterium sp. CA49 for asymmetric reduction of aryl ketoesters., Li TB, Zhao FJ, Liu Z, Jin Y, Liu Y, Pei XQ, Zhang ZG, Wang G, Wu ZL, Enzyme Microb Technol. 2019 Jun;125:29-36. doi: 10.1016/j.enzmictec.2019.03.001. , Epub 2019 Mar 4. PMID: 30885322

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