Search for extraterrestrial life: new challenge Λ Mars: special exobiologic interest for upcoming missions (ESA-EXOMARS, NASA-PHOENIX...) Λ New tools, miniaturized, sensitive biochip development Λ Resistance of these new tools to space conditions? Λ Radiation : critical issue Λ Need for simulations to define relevant experiment parameters Λ BiOMAS (Biochip for Organic Matter Analysis in Space) project: funded by the French Space Agency (CNES) € BiOMAS - ARCoR (Antibodies Resistance to Cosmic Radiation