1. Max-Planck Institute for Biophysical Chemistry, Göttingen, Germany
2. Department of Plant Biochemistry, Albrecht-von-Haller Institute for Plant Sciences, Georg-August-University, Göttingen, Germany
3. Institute for Physical and Theoretical Chemistry, J. W. Goethe University, Frankfurt, Germany
4. Institute for Organic and Biomolecular Chemistry, Georg-August-University, Göttingen, Germany