1. Structural Glycobiology Team, Systems Glycobiology Research Group, RIKEN-Max Planck Joint Research Center, RIKEN Global Research Cluster, 2-1 Hirosawa; Wako-City, Saitama 351-0198 Japan
2. Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization; Tsukuba Japan
3. Research Institute for Microbial Diseases and WPI Immunology Frontier Research Center, Osaka University; Suita Osaka 565-0871 Japan
4. Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology; Jiangnan University; Wuxi Jiangsu 214122 China