The first-of-its-kind experiment proved that gamma ray-catalyzed reactions can produce amino acids, which contributed to the origin of life on Earth.
, Kebukawa said, "As far as we know, it is the first time amino acids [have been produced] from formaldehyde and ammonia by gamma rays. We kind of expected that some amino acids would be produced, but the results were much better than expected, with quality and quantity. Various amino acids were produced by gamma-ray, and their amount was significant," she said.In their experiment, the researchers dissolved formaldehyde and ammonia in water and sealed the solution in glass tubes.
The scientists found that the production of α-amino acids, such as alanine, glycine, α-aminobutyric acid, and glutamic acid, and β-amino acids, such as β-alanine and β-aminoisobutyric acid, rose in the irradiated solutions as the total gamma-ray dose increased.
"Amino acids can be produced non-biologically in various space environments," Kebukawa told Motherboard. "Among them, meteorite parent body processes are the final stage of organic evolution in space before being delivered to the Earth. The amino acids produced in meteorite parent bodies would be directly delivered to the ancient Earth as meteorites, and might become building blocks of life.
According to the researchers, their study proved that gamma ray-catalyzed reactions could produce amino acids, which contributed to the origin of life on Earth.Carbonaceous chondrites contain life’s essential building blocks, including amino acids, and their delivery of organic compounds would have played a key role in life’s emergence on Earth. Aqueous alteration of carbonaceous chondrites is a widespread process induced by the heat produced by radioactive decay of nuclides like 26Al.
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Gamma-rays may have helped meteorites seed Earth with the building blocks of lifeRobert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter sciencef1rst.
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