1. Department
of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
2. Japan
Science and Technology Agency (JST), The Exploratory Research for
Advanced Technology (ERATO), Bionanotransporter Project, Katsura Int’tech Center, Katsura, Nishikyo-ku, Kyoto 615-8530, Japan