How life emerged on Earth from an assortment of non-living molecules is a stubbornly enduring mystery.
Lo and behold, during the first hour of the experiment, glycine coupled up to make a two unit molecule called a dimer. This reaction releases protons that in turn neutralize the pH required for the dimerization to take place, effectively putting the brakes on the whole process., as the solution's pH became more neutral the dimers slowly started to link with each other into slightly longer chains.
"What we're showing here is that it doesn't necessarily have to be the same environment throughout all the reactions,"Boigenzahn."They can occur in different environments, provided that the reactions that are occurring help create an environment that's beneficial for the next steps." A cycle of transitions between wet and dry conditions could grow the molecule into more complex proteins, of which some might promote other chemical reactions involved in life.
"The fact that these reaction mechanisms have been known for many years and there has been limited appreciation for the link between them suggests that it may be worthwhile to pay greater attention to the effects of proposed prebiotic reactions on their environment, in addition to the effects of the environment on the reactions," Boigenzahn and teamThis is not the first clue that the origins of life may have occurred at the edge of wetness either.
There's still a long way to go before understanding all that's involved, but making sense of the processes behind the creation of life could also open the door to new, more powerful chemistry-based technologies.says"DNA stores information at thousands of times the density of a computer chip can. If we could get systems that do this without necessarily being living cells, then you start to think about all sorts of new functions and processes occurring at the molecular level.
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