Mirror symmetry breaking of the bioorganic world: biogenic and abiogenic approaches

While inorganic nature contains equal amounts of different chirality type molecules, living nature is chirally pure. This mirror asymmetry of the bioorganic world on the molecular level is one of the unsolved mysteries of biology. A number of approaches to the solution of this problem were developed. Biogenic approaches claim that the property of chiral purity was selected in the course of biological evolution due to competitive advantage acquired by chirally pure organisms relative to racemic ones. According to the abiogenic approaches chiral symmetry was broken during the prebiotic stage of evolution either due to the presence of asymmetric factors or spontaneously.