1. Computational Biology Center, IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, United States
2. School of Chemical Sciences, Meritorious Autonomous University of Puebla (BUAP), University City, Puebla 72570, Mexico
3. Institute of Quantitative Biology, College of Life Sciences, Zhejiang University, Hangzhou 310027, China
4. Department of Chemistry, Columbia University, New York, New York 10027, United States