1. Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan