1. Department of Biochemistry, University of Nebraska, Lincoln, NE 68588, USA
2. Department of Pathobiology, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195, USA
3. Division of Neuroscience, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA
4. Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA