About the Authors
European Molecular Biology Laboratory, Heidelberg, Germany
European Molecular Biology Laboratory–European Bioinformatics Institute, Hinxton, United Kingdom
The authors have declared that no competing interests exist.
VN and RBR conceived and designed the experiments. VN and ISA performed the experiments. VN and RBR analyzed the data. RL, AS, FdM, TJG, JL, and LS contributed reagents/materials/analysis tools. VN, RL, AS, and RBR wrote the paper.