1. Chair of Molecular Biotechnology, Technische Universität Dresden, Dresden 01217, Germany
2. Macromolecular Crystallography, Helmholtz-Zentrum Berlin, Berlin 12489, Germany
3. Malopolska Centre of Biotechnology (MCB), Jagiellonian University, Krakow 31-007, Poland
4. Department of Molecular Biology, Max Planck Institute for Multidisciplinary Sciences, Göttingen 37077, Germany
5. Department of Medical Biochemistry, Umeå University, Umeå 1965, Sweden
6. Department of Biochemistry and Biophysics, Stockholm University, Stockholm 114 19, Sweden