1. Department of Bioinformatics Engineering; Graduate School of Information Science and Technology, Osaka University; 1-5 Yamadaoka, Suita Osaka 565-0871 Japan
2. Exploratory Research for Advanced Technology, Japan Science and Technology Agency; 1-5 Yamadaoka, Suita Osaka 565-0871 Japan
3. Graduate School of Frontier Biosciences, Osaka University University 1-5 Yamadaoka; Suita Osaka 565-0871 Japan
4. Earth-Life Science Institute, Tokyo Institute of Technology; Meguro Tokyo 152-8550 Japan