Department of Chemistry and Biochemistry, Center for Theoretical Biological Physics, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0359, USA. wimclaug@ucsd.edu|Department of Chemistry and Biochemistry, Center for Theoretical Biological Physics, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0359, USA. wimclaug@ucsd.edu|Department of Chemistry and Biochemistry, Center for Theoretical Biological Physics, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0359, USA. wimclaug@ucsd.edu|Department of Chemistry and Biochemistry, Center for Theoretical Biological Physics, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0359, USA. wimclaug@ucsd.edu