1. Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy New York 12180
2. Department of Mathematical Sciences; Rensselaer Polytechnic Institute; Troy New York 12180
3. Department of Chemistry; University at Albany, State University of New York; Albany New York 12222
4. Soft Matter Theory and Simulations Group; Computational Biology Center, IBM Thomas J. Watson Research Center; Yorktown Heights New York 10598
5. Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School; Boston Massachusetts 02115