EOB was reduced faster by the permeabilized cells than by the control cells. Both the yield and the enantiomeric excess of (S)-(+)-3-EHB were low when the cell concentration was less than 90 mg/ml.

• 细胞浓度对反应有明显影响；当透性化酵母细胞浓度<90mg/ml时；(S)(+)3EHB的产率和对映体过量值都较低;