1. Institute of Biochemistry, Dresden University of Technology, D-01062 Dresden, Germany, Julich Chiral Solutions GmbH, Prof.-Rehm-Strasse 1, D-52428 Jülich, Germany, AC Biotec GmbH, Prof.-Rehm-Strasse 1, D-52428 Jülich, Germany, and Institute of Technical Chemistry, Freiberg University of Technology, D-09596 Freiberg, Germany