1. Institute for Bioscience and Biotechnology Research, Rockville, Maryland 20850, USA
2. Biological Sciences Graduate Program - Molecular and Cellular Biology Concentration, University of Maryland, College Park, Maryland 20742, USA
3. Department of Biochemistry and Chemistry, University of Maryland, College Park, Maryland 20742, USA
4. Department of Veterinary Medicine, University of Maryland, College Park, Maryland 20742, USA