Selective decomposition of either enantiomer or aspartic acid irradiated with60Co-γ-rays in the mixed aqueous solution with D- or L-alanine

Supernova antineutrino interactions cause chiral symmetry breaking and possibly homochiral biomaterials for life

There is some evidence that nonracemic hydrocarbons occur in meteorites. This would indicate an extraterrestrial origin of the homochirality in living systems (proteins, DNA, RNA). The weak interaction breaks chiral symmetry, but a robust process is needed. We propose that, in an SNII explosion, antineutrinos could provide this mechanism in the solar cloud. Pre-simple estimates of this possibility are given here.