altered the transition state. Substrate mapping analysis strongly suggested that the CH/π interaction partly enhanced the (R)-enantiomer reactivity, the estimated energy of the CH/π interaction being −0.4 kcal mol−1. The substrate scope of the I287F/I290A double mutant was broad. This biocatalyst was useful for the dynamic kineticresolution of a variety of bulky secondary alcohols for which the wild-type