1. Department of Medical Biochemistry and Biophysics, Umeå University, Umeå 90736, Sweden
2. Department of Chemistry, Umeå University, Umeå 90736, Sweden
3. Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia
4. Department of Integrative Medical Biology, Umeå University, Umeå 90736, Sweden
5. Department of Radiation Sciences, Umeå University, Umeå 90736, Sweden