1. Gene Expression and Regulation Section, Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
2. Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48823, USA
3. Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA
4. Collaborative Protein Technology Resource, Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
5. Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA 02111, USA