1. Department of ChemistryUniversity of Graz Heinrichstrasse 28 8010 Graz Austria
2. Austrian Centre of Industrial Biotechnology Petersgasse 14 8010 Graz Austria
3. Current address: Opole University of TechnologyFaculty of Mechanical Engineering, 5 Mikołajczyka Street 45-271 Opole Poland
4. White Biotechnology Research BiocatalysisBASF SE Carl-Bosch-Strasse 38 67056 Ludwigshafen Germany