1 Laboratoire des Biomolécules, Sorbonne Universités, UPMC Université Paris 06, 4 place Jussieu, 75005 Paris, France; Département de Chimie, Ecole Normale Supérieure-PSL Research University, 24 rue Lhomond, 75005 Paris, France; UMR 7203, Laboratoire des Biomolécules, CNRS, 75005 Paris, France.
2 Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978 Tel Aviv, Israel.
3 Department of Molecular Biophysics and Biochemistry, Yale University, 260 Whitney Avenue, New Haven, CT 06520-8114, USA.