1. Department of Biochemistry, National University of Singapore, Singapore 117597; Cancer Functional Genomics Laboratory, Johns Hopkins Singapore, Singapore 117610; and Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205
2. Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
3. Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892