1. Division of Systems Biology; Graduate School of Biological Sciences; Nara Institute of Science and Technology; 8916-5 Takayama Ikoma Nara 630-0192 Japan
2. Department of Information Science and Technology; Aichi Prefectural University; Nagakute Aichi 480-1198 Japan
3. Department of Life Science; Graduate School of Bioresources; Mie University; Tsu Mie 514-8507 Japan