EMBL Outstation Hinxton, The European Bioinformatics Institute (EBI), Wellcome Trust Genome Campus, Hinxton, Cambridgeshire, CB10 1SD, UK. pkersey@ebi.ac.uk|EMBL Outstation Hinxton, The European Bioinformatics Institute (EBI), Wellcome Trust Genome Campus, Hinxton, Cambridgeshire, CB10 1SD, UK. pkersey@ebi.ac.uk|EMBL Outstation Hinxton, The European Bioinformatics Institute (EBI), Wellcome Trust Genome Campus, Hinxton, Cambridgeshire, CB10 1SD, UK. pkersey@ebi.ac.uk