1. Department of Molecular Biophysics and Physiology, Rush University Medical Center, Chicago, Illinois 60612 and Department of Physical Chemistry, Pannon University, P.O. Box 158, H-8201, Veszprém, Hungary
2. Department of Physical Chemistry, Pannon University, P.O. Box 158, H-8201, Veszprém, Hungary
3. Department of Molecular Biophysics and Physiology, Rush University Medical Center, Chicago, Illinois 60612
4. Department of Physiology and Biophysics, University of Miami School of Medicine, Miami, Florida 33101
5. Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602