1. R. Kurokawa, M.-H. Ogliastro, C. K. Glass, Divisions of Cellular and Molecular Medicine and Endocrinology and Metabolism, Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0651, USA.
2. D. Kalafus, Divisions of Cellular and Molecular Medicine and Endocrinology and Metabolism and Biomedical Sciences Graduate Program, Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0651, USA.
3. C. Kioussi, J. Torchia, M. G. Rosenfeld, Howard Hughes Medical Institute, Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0651, USA.
4. L. Xu, Biomedical Sciences Graduate Program, and Howard Hughes Medical Institute, Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0651, USA.