1. Instituto de Estructura de la Materia
2. IEM-CSIC
3. 28006 Madrid
4. Spain
5. Department of Biophysics
6. Faculty of Science
7. P.J. Safarik University in Kosice
8. 041 54 Kosice
9. Slovak Republic
10. Institute of Experimental Physics
11. SAS
12. 041 01 Kosice
13. Department of Biochemistry