1. Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
2. Department of Biochemistry & Molecular Medicine, School of Medicine, University of California, Davis, 2700 Stockton Blvd., Suite 2102, Sacramento, California 95817, United States
3. Center for Neuroscience, University of California, Davis, 1544 Newton Ct., Davis, California 95618, United States