1. Department of Chemistry and Computer
Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,
United States
2. Department
of Biological Engineering and Computer Science and Artificial Intelligence
Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
3. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester,
Massachusetts 01655, United States
4. Program in RNA Biology, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, United States
5. Department of Biological Engineering,
Department of Electrical Engineering and Computer Science, and Computer
Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,
United States