1 Graduate School of Information Science, 2 Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan, 3 Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai, Haga, Tochigi 321-3497, 4 Department of Bioscience, Tokyo University of Agriculture, 5 Genome Research Center, NODAI Research Institute, Tokyo Univer