hydroamination of aryl alkenes to produce chiral amines. The process involves sequential alkene asymmetric hydration catalyzed by a hydratase (HD), followed by in situ oxidation of alcohol into ketone by two enantiocomplementary alcohol dehydrogenases (ADHs), and finally, enantioselective transformation of ketone into enantiomericallypure amine by a ω-transaminase (TA). The addition of lactate dehydrogenase (LDH)