Bioinformatics Project, National Institute of Biomedical Innovation, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan. yoichi@ecei.tohoku.ac.jp.|Bioinformatics Project, National Institute of Biomedical Innovation, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan. yoichi@ecei.tohoku.ac.jp.