1. Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Bonn, Germany
2. Institute of Applied Microbiology, RWTH Aachen, Aachen, Germany
3. Institute for Molecular Enzyme Technology, Heinrich Heine University Düsseldorf, Jülich, Germany
4. Institute of Bio- and Geosciences IBG 1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany