1. Center for Biological Sequence Analysis, Technical University of Denmark, DK-2800 Lyngby, Denmark.
2. Genetics of Bacterial Genomes, Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France.
3. Laboratory of Genome Information, Kitasato Institute for Life Science, Kitasato University, 1-15-1, Kitasato, Sagamihara, Kanagawa, 228-8555 Japan.
4. Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita 565-0871, Osaka, Japan.
5. Laboratory of Plant Molecular Biology, RIKEN, 3-1-1 Koyadai, Tsukuba, Ibaraki, 305-0074 Japan.
6. Department of Genetics, Rutgers University, 604 Allison Road, Piscataway, NJ 08854-8082, USA.
7. Howard Hughes Medical Institute, University of Chicago, 1103 E. 57th Street, Chicago, IL 60637, USA.