1. Department of Developmental and Cell Biology (F.G., Z.Z., L.M., K.A., R.C., D.M.G., B.B.), University of California Irvine, Irvine California 92697-2300;
2. National Institutes of Natural Sciences (H.W., T.I.), National Institute for Basic Biology, Okazaki Institute for Integrative Bioscience, Okazaki 444-8787, Japan;
3. Division of Cellular & Molecular Toxicology (J.K.), Biological Safety Research Center, National Institute of Health Sciences, Setagaya-ku, Tokyo 158-8501, Japan