1. Biomacromolecule Research Team, RIKEN Center for Sustainable Resource Science, Wako-shi, Saitama 351-0198, Japan
2. Institute for Advanced Biosciences, Keio University, Tsuruoka-shi, Yamagata 997-0017, Japan
3. School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan
4. Center for Bioscience Research and Education, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan
5. Department of Material Chemistry, Kyoto University, Kyoto-shi, Kyoto 615-8510, Japan