1. Neuroscience and Physiology and Psychiatry, New York University School of Medicine, New York, NY 10016, U.S.A.
2. Skirball Institute for Biomolecular Medicine, New York University School of Medicine, New York, NY 10016, U.S.A.
3. Departments of Cell Biology, New York University School of Medicine, New York, NY 10016, U.S.A.