1. Department
of Chemistry, Western Washington University, 516 High Street, Bellingham, Washington 98225-9150, United States
2. National
High Magnetic Field Laboratory, Florida State University, 1800
East Paul Dirac Drive, Tallahassee, Florida 32310-3706, United States
3. Institute
for Nanobiotechnologies, Saint Petersburg State Polytechnical University, Polytechnicheskaya 29, 197376 St. Petersburg, Russia
4. Department
of Physiology and Biophysics, Boston University School of Medicine, 700
Albany Street, Boston, Massachusetts 02118-2526, United States