Tom Shimizu [1] [2] (tom@sfc.keio.ac.jp)
Kouichi Takahashi [1] [3] (t94249kt@sfc.keio.ac.jp)
Masaru Tomita [1] [3] (mt@sfc.keio.ac.jp)
[1] Laboratory for Bioinformatics,
[2] Graduate School of Media and Governance,
[3] Department of Environmental Information,
Keio University
5322 Endo, Fujisawa, Kanagawa 252 Japan