Department of Chemistry, Center for Theoretical Biological Physics, University of California San Diego, La Jolla, California, United States of America. mcprentiss@gmail.com|Department of Chemistry, Center for Theoretical Biological Physics, University of California San Diego, La Jolla, California, United States of America. mcprentiss@gmail.com|Department of Chemistry, Center for Theoretical Biological Physics, University of California San Diego, La Jolla, California, United States of America. mcprentiss@gmail.com