1. Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, Cambridge CB2 1QR, U.K.
2. Department of Biochemistry, University of Cambridge, University of Cambridge, Cambridge CB2 1GA, U.K.
3. Cambridge Systems Biology Centre, University of Cambridge, Cambridge CB2 1GA, U.K.
4. Technion Integrated Cancer Center (TICC), The Rappaport Faculty of Medicine and Research Institute, Haifa, Israel
5. Department of Genetics, University of Cambridge, University of Cambridge, Cambridge CB2 3EH, U.K.
6. Institute of Structural and Molecular Biology, University College London, London WC1E 7HX, United Kingdom