1. Department of Genetics, University of North Carolina, Chapel Hill, North Carolina 27599
2. Department of Computer Science, University of North Carolina, Chapel Hill, North Carolina 27599
3. Division of Life and Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760 South Korea
4. Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, Buffalo, New York 14263
5. Department of Molecular and Cellular Medicine, Texas A&M University, College Station, Texas 77843
6. Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843