1. Sanders-Brown Center on Aging and Alzheimer's Disease Research Center, 101 Sanders-Brown Bldg, University of Kentucky, Lexington, KY 40536-0230, USA
2. Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
3. Departments of Pathology and Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA
4. Departments of Pathology and Neurology, University of Kentucky, Lexington, KY 40536-0230, USA