1. Department
of Chemistry, University of Rochester,
Rochester, New York 14627,
United States
2. Center for
RNA Biology, University of Rochester, Rochester,
New York 14642,
United States
3. Department
of Biochemistry and
Biophysics, University of Rochester, Rochester,
New York 14642, United States
4. Department of Chemistry, Buena Vista University, Storm Lake, Iowa 50588, United
States
5. Department of Chemistry
and
Center for RNA Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United
States