Swiss-Prot Group, SIB Swiss Institute of Bioinformatics, Centre Medical Universitaire, 1211 Geneva 4, Switzerland.|Protein Information Resource, University of Delaware, Newark, DE 19711, USA.|European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, Cambridge CB10xe2x80x891SD, UK.|European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, Cambridge CB10xe2x80x891SD, UK.|National Center for Biotechnology Information (NCBI), US National Library of Medicine, Bethesda, MD 20894, USA.|National Center for Biotechnology Information (NCBI), US National Library of Medicine, Bethesda, MD 20894, USA.|Swiss-Prot Group, SIB Swiss Institute of Bioinformatics, Centre Medical Universitaire, 1211 Geneva 4, Switzerland.|European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, Cambridge CB10xe2x80x891SD, UK.|Swiss-Prot Group, SIB Swiss Institute of Bioinformatics, Centre Medical Universitaire, 1211 Geneva 4, Switzerland.|Swiss-Prot Group, SIB Swiss Institute of Bioinformatics, Centre Medical Universitaire, 1211 Geneva 4, Switzerland.|Swiss-Prot Group, SIB Swiss Institute of Bioinformatics, Centre Medical Universitaire, 1211 Geneva 4, Switzerland.