Asymmetric bioreduction of acetophenones by Baker's yeast and its cell-free extract encapsulated in sol-gel silica materials

- Baker's yeast (BY) and its cell-free extract were encapsulated inside sol-gel silica matrix.
- The activity and enantioselectivity of encapsulated BY were similar to those of free BY solution.
- Cell-free extract of BY had better enantioselectivity by encapsulation.