1. Institute of Biochemistry; Dept. of Biotechnology & Enzyme Catalysis; University of Greifswald; Felix-Hausdorff-Str. 4 17487 Greifswald Germany
2. Institute of Technical Biocatalysis; Hamburg University of Technology; Denickestr. 15 21073 Hamburg Germany
3. Organic Chemistry I, Faculty of Chemistry; Bielefeld University; P.O. Box 100131 33501 Bielefeld Germany