1. Department of Molecular Biology, University of Gdańsk, Kładki 24, 80-822 Gdańsk, Poland
2. Department of Medical Biotechnology, Intercollegiate Faculty of Biotechnology UG-AMG, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk, Poland
3. Institut de Génétique et Microbiologie, Université Paris-Sud, Bâtiment 409, 91-405 Orsay Cedex, France