1. Department of Biochemistry and Molecular Biology, Gordon Center for Integrative Sciences, University of Chicago, Chicago, IL 60637
2. Swiss Institute of Bioinformatics, Biozentrum, University of Basel, CH-4056 Basel, Switzerland
3. Department of Theoretical and Computational Biophysics, Max Planck Institute for Biophysical Chemistry, 37077 Goettingen, Germany
4. Institute for Biocomplexity and Informatics, and Department of Biological Sciences, University of Calgary, Calgary, Alberta T2N 1N4, Canada
5. School of Chemistry, University of Wollongong, NSW 2522 Wollongong, Australia