1. Key Laboratory of Hebei Province for Molecular Biophysics Institute of Biophysics Hebei University of Technology Tianjin 300401 P. R. China
2. Department of Life Science and Bioprocesses Fraunhofer Institute for Applied Polymer Research IAP Geiselbergstr. 69 14476 Potsdam-Golm Germany
3. Department of Biochemistry University of Potsdam Karl-Liebknecht-Str. 24–25 14476 Potsdam-Golm Germany
4. Chair of Polymer Materials and Polymer Technologies Institute of Chemistry University of Potsdam Karl-Liebknecht-Str. 24–25 14476 Potsdam-Golm Germany