Cysteine is one of the 20 amino acids that are present for protein synthesis in organisms. Scientists are using this amino acid to try to recreate how proteins first started forming during the origin of life. Based on data of the earths surface during the time of the development of life, hydrogen cyanide and hydrogen sulfate were heavily prevalent. These so happen to be the molecules that form cysteine and in a very simple lab experiment the researchers recreated this phenomenon. Cysteine was originally thought of not to have any role in the formation of life, but researchers also noticed that cysteine produces a resin that catalyzes polypeptide development by combining peptide fragments in water. Without cysteine, protein synthesis could not have happened at a high enough rate to explain the timeline of the evolution of life. This amino acid helps us better understand how life was created on this planet and takes us one step further to fully understanding how life evolved.
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