CEA DSV IG, Genoscope, Evry, France. aatsmith@orange.fr|CEA DSV IG, Genoscope, Evry, France. aatsmith@orange.fr|CEA DSV IG, Genoscope, Evry, France. aatsmith@orange.fr|CEA DSV IG, Genoscope, Evry, France. aatsmith@orange.fr|CEA DSV IG, Genoscope, Evry, France. aatsmith@orange.fr