Boreskov

OP‐7ABIOGENIC SYNTHESIS OF OLIGOPEPTIDES IN OPEN SPACE CONDITONSSimakov M.*, Kuzicheva E., Gontareva N.Group of Exobiology, Institute of Cytology, RAS, St. Petersburg, Russia*exobio@mail.cytspb.rssi.ruThe complex chemical processes could take place on surface of small bodies inside anyplanetary systems at different stages of their evolution. There are a huge chemical reactor inthe course of all star system’s history and the transport of prebiotic and biotic moleculesfrom outer space to planets is considered as an important source of organics.All young star system objects are subjected to energetic processing by photons and ions.As a result, the chemical and physical properties of the materials composing these objectswill change significantly over time. Energetic processing of organic compounds into morecomplex species can be driven by a significantly enhanced UV–field in star forming regions,high‐energy particle bombardment, and UV–radiation from the T–Tauri phase in stellar birth;at the early stage of evolution and at the present, UV–radiation of different wavelengths,protons of the Solar wind, and flares can drive this process. Among several energy sourcesavailable for abiogenic synthesis of biomolecules in space, UV–light with differentwavelengths and cosmic rays are two of the most abundant.The reactions of the amino acids in solid mixtures were the primary objective of ourinvestigation — primarily, the abiogenic synthesis of oligopeptides from mixtures of simpleamino acids. Four mixtures of aromatic (tyrosine or tryptophan) and aliphatic (glycine oralanine) amino acids were investigated usually. Amino acids were irradiated in solid statewith different sources of energy: (1) VUV–light of 145 nm; (2) UV‐light of 265 nm; (3) highenergy protons (2‐6 MeV); (4) γ–radiation, and (5) were installed on the surface ofbiosputnik in outstanding container when they were exposed to the action of all spectra ofthe open space energy sources during the entire time of flight — 327 hours.We have shown experimentally that the solid mixtures of amino acids produce morecomplex compounds when they are exposed to either UV photons or ionizing radiation. Bothirradiation and photolysis may destroy molecules as well as allow the synthesis of new andmore complex ones. The chemical reaction of solid‐state amino acids induced by differentenergy sources has been of increasing interest in several fields such as chemical evolution,40