ConclusionsA series of non-proteinogenic amino acids, most of them found in carbonaceous chondrites were irradiated in the solid state and in vacuum to a radiation dose of 3.2 MGy, equivalent to 23% of the total dose expected to be received by these molecules if embedded in asteroids, comets and other bodies of the solar system from its formation until now (4.6 ?? 109 years).The radiolyzed amino a