1. Institute of Molecular Enzyme Technology, Heinrich Heine University Düsseldorf, Jülich, Germany
2. Bayer AG, Leverkusen, Germany
3. Institute of Catalysis, Consejo Superior de Investigaciones Científicas, Madrid, Spain
4. Institute for Bio- and Geosciences IBG-1, Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany