Affiliation: | 1. Laboratory of Cellular and Molecular Biology, National Cancer Institute, NIH, Bethesda, MD 20892, USA;2. Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD 20892, USA;3. National Institute of General Medical Sciences, NIH, Bethesda, MD 20892, USA |