[1] CEA, DRF, Genoscope, IG,UMR 8030, F-91057 Evry, France
[2] CNRS, UMR8030, F-91057 Evry, France
[3] Univ Evry Val Essonne, UMR 8030, F-91057 Evry, France
[4] Univ Blaise Pascal, Clermont Univ, ICCF, BP 10448, F-63000 Clermont Ferrand, France
[5] CNRS, UMR 6296, BP 80026, F-63177 Aubiere, France