1. Faculty of Biology, Institute of Genetics and Biotechnology, University of Warsaw , Warsaw 02-106 , Poland
2. IBGC, Univ. Bordeaux, CNRS, UMR 5095 , F-33000, Bordeaux , France
3. MFP, Univ. Bordeaux, CNRS, UMR 5234 , F-33000, Bordeaux , France
4. Polish Academy of Sciences, Institute of Biochemistry and Biophysics , Warsaw 00-901 , Poland