1. Department of Mathematics, Department of Physics and Center for the Study of Biocomplexity,
2. Department of Computer Science and Engineering, University of Notre Dame, Notre Dame, IN 46556-5670, USA
3. Department of Physics, Emory University, Atlanta, GA 30322, USA
4. Biocomplexity Institute and Department of Physics, Indiana University, 727 East 3rd Street, Swain Hall West 159, Bloomington, IN 47405-7105, USA
5. Department of Cell Biology & Anatomy, New York Medical College, Basic Science Building, Valhalla, NY 10595, USA