1. Lipid Biology Laboratory, RIKEN (Institute of Physical and Chemical Research) Discovery Research Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan, Supra-Biomolecular System Research Group, RIKEN Frontier Research System, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan, and INSERM U585, INSA (Institut National des Sciences Appliquees)-Lyon, 20 Ave A. Einstein, 69621 Villeurbanne, France