Kahn Rhrissorrakrai1, Kristin C Gunsalus2. 1. IBM Computational Biology Center, 1101 Kitchawan Rd., Yorktown Heights, NY, 10598, USA. 2. Center for Genomics and Systems Biology, Department of Biology, New York University, 12 Waverly Place, New York, NY, 10003, USA. kcg1@nyu.edu.