1. Ruhr University, Department of Physical Chemistry I, Protein Interactions, Universitätsstrasse
150, 44780 Bochum, Germany
2. Ruhr University, Department of Biophysics,
Protein Crystallography, Universitätsstrasse
150, 44780 Bochum, Germany
3. Max Planck Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227
Dortmund, Germany
4. Ludwig-Maximilians-University Munich, Department of Physiological Chemistry, Adolf
Butenandt Institute, Butenandtstrasse 5, 81377 Munich, Germany