2.5. Chemicals
Kanamycin and isopropyl-β-D-thiogalactopyranoside (IPTG) are purchased
from Trans-Gen Biotech (Shanghai, China). NADPH and phenylpyruvate are
purchased from Sigma Chemical Company (Tianjing, China). The ionic
liquids (99% purity) are purchased from Sigma Chemical Company
(Tianjing, China). All other chemicals are analytical grade and
purchased from Sinopharm Chemical Reagent Co. Ltd (Shanghai, China).