1. Peptide
Chemistry Research Center, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, Iran
2. Medical
Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
3. Organisch-Chemisches Institut der Universitaet Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
4. Department
of Biophysics, Tarbiat Modares University, Tehran, Iran