1. Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States
2. Department of Physiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
4. Laboratory of Computational Biology, National Institutes of Health, Bethesda, Maryland 20892, United States
5. Bioinformatics and Genomics Graduate Program, The Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania 16802, United States