1. Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.
2. New England BioLabs, Ipswich, MA 01938, USA.
3. Department of Cellular and Molecular Physiology, Yale University, New Haven, CT 06520, USA.
4. Systems Biology Institute, Yale University, West Haven, CT 06516, USA.
5. Department of Chemistry, Yale University, New Haven, CT 06520, USA.