The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. jong@biosophy.org|The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. jong@biosophy.org|The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. jong@biosophy.org|The European Bioinformatics Institute, EMBL Outstation, Cambridge CB10 1SD, UK. jong@biosophy.org