1. DOE-Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824, United States
2. Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, United States
3. Department of Physics, City College of New York, New York, New York 10031, United States
4. Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States
5. Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States