1. School of Biological Sciences University of East Anglia Norwich Research Park Norwich NR4 7TJ UK
2. John Innes Centre Norwich Research Park Norwich NR4 7UH UK
3. The Genome Analysis Centre Norwich, Research Park Norwich NR4 7UH UK
4. School of Biological Sciences Durham University Durham DH1 3LE UK
5. Department of Biology University of Leicester Leicester LE1 7RH UK