1. Department of Biotechnology and Enzyme Catalysis Institute of Biochemistry University of Greifswald Felix Hausdorff-Str. 4 17487 Greifswald Germany
2. Institute of Pharmacy University of Greifswald Friedrich-Ludwig-Jahn-Str. 17 17487 Greifswald Germany
3. Enzymicals AG Walther-Rathenau-Str. 49 17487 Greifswald Germany
4. HERBRAND PharmaChemicals GmbH, Betriebsstätte Anklam An der Redoute 1 17390 Murchin Germany