标题: Hxxbbb CartDesk: the desk of the future [打印本页] 作者: MethrenGlode 时间: 2024-2-3 11:35 标题: Hxxbbb CartDesk: the desk of the future Xama What is the new season of 鈥淕ilmore Girls鈥?like?
One more than the others A group of researchers has created a new organism. Characteristics? It has 21 amino acids, one more asics gel than all other living things on Earth. Escherichia coli bacteria: usually consist of 20 amino acids. Now one has been created with 21. Why are there always only 20 amino acids that make up organic matter? Why hasn't the genetic code evolved, asics asics gel kayano , and has instead always maintained this number for 4 billion years now? How could life change if there was one more amino acid? To find answers to this type of question, asics gel 1130 some researchers from the Scripps Research Institute in La Jolla (Cal, shoes by shoes Usa), have managed for the first time to create an organism equipped with 21 amino acids. In paarticular have modified the genome of the bacterium Escherichia coli, adding a portion that encodes a new amino acid, p-aminophenylalanine. Then, by analyzing the proteins produced by the bacterium, they discovered that it was distributed evenly. The litmus test. Similar experiments have already been done. But previously the new amino acid, instead of being added, took the place of an old one. At this point the research will proceed in this way: to find out if it really works, the new bacterium will be compared with its peers. The way in which it reacts to competition and possibly how it evolves will be analyzed. The researchers also looked at another aspect: Escherichia coli reproduces very quickly. To prevent the new organism from escaping from the laboratory, they therefore altered its ability to synthesize another essential amino acid, ...