1. Genome CenterUniversity of California, Davis Davis California
2. Biozentrum & SIB Swiss Institute of BioinformaticsUniversity of Basel Basel Switzerland
3. Institute of Structural and Molecular Biology, Birkbeck CollegeUniversity of London London UK
4. Institute for Bioscience and Biotechnology Research Rockville Maryland
5. Department of Cell Biology and Molecular GeneticsUniversity of Maryland College Park Maryland