1. Faculty
of Physics, St. Petersburg State University, Ulyanovskaya str. 3, Petrodvorets, St. Petersburg 198504, Russia
2. Belozersky
Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory, 1/40, Moscow 119991, Russia
3. Institute
of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi
Prospect V.O. 31, St. Petersburg 199004, Russia