title: Study of the peptide prebiotic synthesis in context of exobiological investigations on earth orbit.
abstract: Dry films of amino acids mixtures glycine+ tryptophan and tryptophan were exposed on the surface of "Mir" station. Similar films were irradiated by vacuum ultra violet (145 nm) and ultra violet (254 nm) in the laboratory experiments. Gly-Gly, Trp-Gly, Gly-Trp, Tpr-Trp and Trp-Trp-Trp were the main reaction products for the experimental mixture glycine + tryptophan and Tpr-Trp and Trp-Trp-Trp for tryptophan. The presence of Lunar soil both in flight and in laboratory experiments increases the reaction yield by 1.5-2.0 times. Therefore, the hypothesis concerning the possibility of safe delivery of peptides and amino acids required for the emergence of life and associated with mineral have got yet another approval.
authors.affiliation: Institute of Cytology, Laboratory of Exobiology, Tikhoretsky pr. 4, 194064, St Petersburg, Russia.
authors.forename: E A
authors.initials: EA
authors.lastname: Kuzicheva
authors.forename: N B
authors.initials: NB
authors.lastname: Gontareva
mesh_terms: D019143:Evolution, Molecular; D018559:Exobiology; D005118:Extraterrestrial Environment; D005720:Gamma Rays; D005998:Glycine / Q000737:chemistry / Q000528:radiation effects*; D016081:Moon; D010455:Peptides / Q000138:chemical synthesis*; D012987:Soil; D013026:Space Flight; D018531:Spacecraft; D014364:Tryptophan / Q000737:chemistry / Q000528:radiation effects*; D014466:Ultraviolet Rays
chemical_list: D010455:Peptides; D012987:Soil; D014364:Tryptophan; D005998:Glycine