1. Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), A-1030 Vienna, Austria.
2. Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.
3. Bioinformatics Department, Research Institute of Molecular Pathology (IMP)–IMBA, A-1030 Vienna, Austria.
4. Protein Chemistry Department, Research Institute of Molecular Pathology (IMP)–IMBA, A-1030 Vienna, Austria.
5. Department of Cellular Biochemistry, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.
6. Department of Chemistry, Yale University, New Haven, CT 06520, USA.