1. Centre de Recherche sur les Macromolécules Végétales (CERMAV, UPR-CNRS 5301) affiliated with Université Joseph Fourier and member of Institut de Chimie Moléculaire ICMG FR2607, BP53, 38041 Grenoble Cedex 9, France
2. Division of Biotechnology and Macromolecular Chemistry, Graduate School of Engineering, Hokkaido University, 060-8628 Sapporo, Japan
3. Department of Polymer Science and Engineering, Graduate school of Science and Engineering, Yamagata University, 992-8510 Yonezawa, Japan