1. Department of Structural and Computational Biology, Max Perutz Labs, Campus Vienna Biocenter, Vienna 1030, Austria
2. Department of Medical Biochemistry, Medical University of Vienna, Vienna 1090, Austria
3. Institute of Cell Biology and Immunology, University of Stuttgart 70569, Stuttgart, Germany
4. Stuttgart Research Center Systems Biology, University of Stuttgart 70569, Stuttgart, Germany
5. Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada V8W 2Y2
6. Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver BC V6T 1Z3, Canada