1. Department of Biological Chemistry; The Weizmann Institute of Science; 7610001 Rehovot Israel
2. Department of Physics; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
3. de Botton Institute for Protein Profiling, The Nancy and Stephen Grand Israel National Center for Personalized Medicine; The Weizmann Institute of Science; 7610001 Rehovot Israel