Wellcome Trust Sanger Institute, CB10 1SA and European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SD, UK. artemis@sanger.ac.uk|Wellcome Trust Sanger Institute, CB10 1SA and European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SD, UK. artemis@sanger.ac.uk|Wellcome Trust Sanger Institute, CB10 1SA and European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SD, UK. artemis@sanger.ac.uk|Wellcome Trust Sanger Institute, CB10 1SA and European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SD, UK. artemis@sanger.ac.uk|Wellcome Trust Sanger Institute, CB10 1SA and European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SD, UK. artemis@sanger.ac.uk