1. Biomacromolecules Research Team RIKEN Center for Sustainable Resource Science Saitama 351-0198 Japan
2. Department of Material Chemistry Graduate School of Engineering Kyoto University Kyoto-Daigaku-Katsura, Nishikyo-ku Kyoto 615-8510 Japan
3. Technology Platform Division Mass Spectrometry and Microscopy Unit RIKEN Center for Sustainable Resource Science Yokohama 230-0045 Japan