1. Applied Physical Chemistry, University of Heidelberg, Germany, and Institute for Molecular Biophysics, The Jackson Laboratory, Bar Harbor, Maine 04609
2. Department of Chemical and Biological Engineering and Institute for Molecular Biophysics, University of Maine, Orono, Maine 04469
3. Ludwig Institute for Cancer Research,1275 York Avenue, New York, New York 10021
4. Department of Pathology, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, New York 10065
5. Department of Surgery, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, New York 10065