1. European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK
2. Wageningen University and Research, Wageningen Plant Research - Bioscience, P.O. Box 16, 6700AA, Wageningen, the Netherlands
3. Department of Biological Sciences, University of Alabama, P.O. Box 870344, Tuscaloosa, AL 35487, USA
4. School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK
5. Institute for Inorganic and Analytical Chemistry, Friedrich-Schiller-University, Lessingstr. 8, 07743 Jena, Germany