1. Randall Centre for Cell and Molecular Biophysics, King's College, London SE1 1YR, UK
2. Institute of Structural and Molecular Biology, Birkbeck, University of London, London WC1E 7HX, UK
3. INSERM UMR-S 1270, 17 Rue du Fer à Moulin, 75005 Paris, France
4. Sorbonne University UMR-S 1270, 4 Place Jussieu, 75005 Paris, France
5. Institut du Fer à Moulin, 17 Rue du Fer à Moulin, 75005 Paris, France
6. Institute of Science and Technology Austria, Am campus 1, 3400 Klosterneuberg, Austria