UC Santa Cruz Genomics Institute, Santa Cruz, California, USA. Department of Biomolecular Engineering, University of California, Santa Cruz, California, USA.|UC Santa Cruz Genomics Institute, Santa Cruz, California, USA. Department of Biomolecular Engineering, University of California, Santa Cruz, California, USA.|UC Santa Cruz Genomics Institute, Santa Cruz, California, USA. Department of Biomolecular Engineering, University of California, Santa Cruz, California, USA.|UC Santa Cruz Genomics Institute, Santa Cruz, California, USA. Department of Biomolecular Engineering, University of California, Santa Cruz, California, USA.|UC Santa Cruz Genomics Institute, Santa Cruz, California, USA. Department of Biomolecular Engineering, University of California, Santa Cruz, California, USA.|UC Santa Cruz Genomics Institute, Santa Cruz, California, USA. Department of Biomolecular Engineering, University of California, Santa Cruz, California, USA.|European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK.