1. School
of Pharmacy, University of Eastern Finland, Biocenter Kuopio, P.O. Box 1627, FI-70211 Kuopio, Finland
2. Engelhardt
Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street 32, Moscow 119991, Russia
3. Université Paris Diderot - Paris, U.F.R. Sciences du
Vivant, 35 rue Hélène
Brion, 75205 Paris
CEDEX 13, France