European Bioinformatics Institute (EMBL-EBI), Cambridge, United Kingdom.|School of Computer Science, University of Manchester, Manchester, United Kingdom.|European Bioinformatics Institute (EMBL-EBI), Cambridge, United Kingdom.|European Bioinformatics Institute (EMBL-EBI), Cambridge, United Kingdom.|European Bioinformatics Institute (EMBL-EBI), Cambridge, United Kingdom.|European Bioinformatics Institute (EMBL-EBI), Cambridge, United Kingdom.