LIX, Ecole Polytechnique, CNRS, Inria, Université Paris-Saclay, Palaiseau, France.|Chair of Applied Dynamics, University of Erlangen-Nuremberg, Erlangen, Germany.|Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA, USA.|Biosciences Division, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, USA.