1. Department of Biology and Center of Nanoscience and Nanotechnology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand, Department of Epithelial Cell Physiology, Max Planck Institute of Molecular Physiology, Otto-Hahn-Strasse 11, Dortmund 44227, Germany, and Institute for Biophysics, Johannes Kepler University of Linz, Altenbergerstrasse 69, Linz A-4040, Austria