1. National Science Foundation, Physics Division, Alexandria, VA 22230, USA
2. The Jane Coffin Childs Memorial Fund for Medical Research, New Haven, CT 06520, USA
3. Department of Genetics and Dermatology, Yale Stem Cell Center, Yale Cancer Center, Yale School of Medicine, New Haven, CT 06510, USA
4. Department of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
5. Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
6. Institut Curie, PSL Research University, Sorbonne Université, CNRS UMR3664, Laboratoire Dynamique du Noyau, Paris 75005, France