1 CNRS UMR7654, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France.
2 Helsinki Institute of Life Science (HiLIFE) - Institute of Biotechnology, University of Helsinki, Finland.
3 Division of Molecular Cell Biology, Zoological Institute, Technische Universität Braunschweig, Germany; Department of Cell Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.