1. European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, Cambridgeshire CB10 1SD, UK
2. European Molecular Biology Laboratory, Structural and Computational Biology Unit, Meyerhofstraße 1, 69117 Heidelberg, Germany
3. Swiss-Prot Group, Swiss Institute of Bioinformatics, CMU, 1 rue Michel Servet, CH-1211, Geneva 4, Switzerland
4. Medical Research Council Laboratory of Molecular Biology, Cambridge Biomedical Campus, Francis Crick Ave, Trumpington, Cambridge CB2 0QH, UK
5. National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda MD 20894 USA
6. Biobyte Solutions GmbH, Bothestr 142, 69126 Heidelberg, Germany
7. Division of Bioinformatics, Department of Preventive Medicine, University of Southern California, Los Angeles, CA 90033, USA
8. Protein Information Resource, Georgetown University Medical Center, Washington, DC 20007, USA
9. Department of Biomedical Sciences, University of Padua, via U. Bassi 58/b, 35131 Padua, Italy
10. Department of Structural and Molecular Biology, University College London, Gower St, Bloomsbury, London WC1E 6BT, UK