1. Department of Pharmacology, University of California San Diego, La Jolla, California 92093United States
2. Center for Theoretical Biological
Physics, La Jolla, California 92093United States
3. Howard Hughes Medical Institute, University of California San Diego, La Jolla, California 92093United States
4. Department of Chemistry & Biochemistry, NSF Center for Theoretical Biological Physics, National Biomedical Computation Resource, University of California San Diego, La Jolla, California 92093, United States
5. Department of Bioengineering, Stanford University, Stanford, California 94305, United States