1. Departments of Pathology & Immunology (T.N., J.K., Q.L., M.M.M.), Baylor College of Medicine, Houston, Texas 77030;
2. Molecular and Cellular Biology (J.P.L., F.J.D., M.M.M.), Baylor College of Medicine, Houston, Texas 77030;
3. Department of Molecular, Cell, and Developmental Biology (K.M.L.), University of California, Los Angeles, California 90095
4. Molecular and Human Genetics (M.M.M.), Baylor College of Medicine, Houston, Texas 77030;