4RF2:
reference: Origins of stereoselectivity in evolved ketoreductases., Noey EL, Tibrewal N, Jimenez-Oses G, Osuna S, Park J, Bond CM, Cascio D, Liang J, Zhang X, Huisman GW, Tang Y, Houk KN, Proc Natl Acad Sci U S A. 2015 Dec 7. pii: 201507910. PMID: 26644568

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