INRIA, Centre de Rennes Bretagne Atlantique, Serpico Project-Team, Rennes, France.|CREST (Ensai, Université Bretagne Loire), Bruz, France.|Institut Curie, PLS Research University, Cellular and Chemical Biology, U1143 INSERM/UMR 3666 CNRS, 26 Rue dUlm, 75248 Paris Cedex 05, France.|INRIA, Centre de Rennes Bretagne Atlantique, Serpico Project-Team, Rennes, France.|Institut Curie, PLS Research University, Cellular and Chemical Biology, U1143 INSERM/UMR 3666 CNRS, 26 Rue dUlm, 75248 Paris Cedex 05, France.|INRIA, Centre de Rennes Bretagne Atlantique, Serpico Project-Team, Rennes, France.