1. The Department of Ecology, Evolution and Behavior, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram 91904, Jerusalem, Israel
2. Present address: Department of Biology, Indiana University, Bloomington, IN, 47405, USA
3. Faculty of Engineering and The Bar-Ilan Institute of Nanotechnology & Advanced Materials, Bar Ilan University 52900 Ramat Gan, Israel
4. Bio-Imaging Unit, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram 91904, Jerusalem, Israel
5. Molecular and Cellular Biology Department, University of Arizona, Tucson, AZ, 85721, USA
6. Biology Department, Trinity College, Hartford, CT, 06106, USA