Department of Bioinformatics, Biomolecular Engineering Research Institute 6-2-3, Furuedai, Suita, Osaka 565-0874, Japan. toh@beri.co.jp|Department of Bioinformatics, Biomolecular Engineering Research Institute 6-2-3, Furuedai, Suita, Osaka 565-0874, Japan. toh@beri.co.jp