Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.|Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.|Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.|Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.|Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.|Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.|Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.|Center for Information Biology, National Institute of Genetics, Mishima 411, Japan.