European Bioinformatics Institute, Wellcome Trust Genome Campus, Cambridge CB10 1SD, UK. sarala@ebi.ac.uk|European Bioinformatics Institute, Wellcome Trust Genome Campus, Cambridge CB10 1SD, UK. sarala@ebi.ac.uk|European Bioinformatics Institute, Wellcome Trust Genome Campus, Cambridge CB10 1SD, UK. sarala@ebi.ac.uk|European Bioinformatics Institute, Wellcome Trust Genome Campus, Cambridge CB10 1SD, UK. sarala@ebi.ac.uk|European Bioinformatics Institute, Wellcome Trust Genome Campus, Cambridge CB10 1SD, UK. sarala@ebi.ac.uk