1. Laboratory of Molecular Gerontology, National Institute on Aging, NIH, NIH Biomedical Research Center, 251 Bayview Blvd, Baltimore, MD 21224, USA
2. Laboratory of Single Molecule Biophysics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
3. Department of Biochemistry, University of Saskatchewan, Health Sciences Building, 107 Wiggins Road, Saskatoon, Saskatchewan S7N 5E5, Canada
4. IFOM, the FIRC Institute for Molecular Oncology Foundation, Milan, Italy
5. Department of Life Science and Biotechnology Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST) 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan
6. Department of Molecular Cancer Biology, Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
7. Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA