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 Court, Davis, California 95618, United States.