1. Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan 48824, United States
2. Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis, 719 Indiana Avenue, Indianapolis, Indiana 46202, United States
3. Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, 410 W. 10th Street, Indianapolis, Indiana 46202, United States