1. Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, California 90095, United States
2. California Nanosystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
3. Faculty of Agriculture, Attached Promotive Center for International Education and Research of Agriculture, Kyushu University, Fukuoka 812-8581, Japan
4. Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, Kansas 66506, United States