[1] Univ Leicester, Med Res Council Toxicol Unit, Leicester LE1 9HN, Leics, England
[2] Univ Roma Tor Vergata, Dept Expt Med & Surg, I-00133 Rome, Italy
[3] St Petersburg State Inst Technol, St Petersburg 190013, Russia
[4] Univ Leicester, Dept Biochem, Leicester LE1 9HN, Leics, England
[5] Russian Acad Sci, Inst Cytol, St Petersburg 194064, Russia
[6] Russian Acad Sci, Engelhardt Inst Mol Biol, Moscow 119991, Russia