1. Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
2. Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
3. Center for Bioscience Research and Education, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan
4. Department of Material Chemistry, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan