Novel epoxide hydrolases in Yarrowia lipolytica have been shown to hydrolyse a variety of functionalised epoxides with good to excellent stereoselectivity and at high volumetric productivities. Individual biotransformation products have been converted into optically active (R)-(tetrahydrofuran-2-yl) methanol (6),(S)-N-benzyl-3-hydroxypyrrolidine (7),(S)-3- hydroxytetrahydrothiophene (8),(S)-N-benzyl-3-acetoxypiperidine (10),(S)-3- ...