1. Gene Center Munich, Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany
2. Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany
3. Research Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Vienna, Austria
4. Max F Perutz Laboratories, Medical University of Vienna, Vienna, Austria
5. Laboratory of Chromosome Biology, Max Planck Institute of Biochemistry, Martinsried, Germany
6. Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France