Researchers have used laboratory simulations to recreate the conditions of early Earth and have discovered that the evolution of ancient proteins into all forms of life on the planet, including plants, animals, and humans, would not have been possible without specific amino acids. The discovery o
The origin of life is a scientific mystery that has captivated researchers for centuries. While there are many theories about how life first arose on Earth, the exact process remains unknown.
chemist who co-led the research with scientists at Charles University in the Czech Republic. “We’re describing the events that shaped why that ancestor got the amino acids that it did.”In the lab, the researchers mimicked primordial protein synthesis of 4 billion years ago by using an alternative set of amino acids that were highly abundant before life arose on Earth.
In its first billion years, Earth’s atmosphere consisted of an assortment of gases like ammonia and carbon dioxide that reacted with high levels of ultraviolet radiation to concoct some of the simpler canonical amino acids. Others arrived via special delivery by meteorites, which introduced a mixed bag of ingredients that helped life on Earth complete a set of 10 “early” amino acids.
Scientists estimate Earth is 4.6 billion years old, and that DNA, proteins, and other molecules didn’t begin to form simple organisms until 3.8 billion years ago. The new research offers new clues into the mystery of what happened during the time in between.
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