The golden rule of biochemistry society that life is laid on the six chemical elements — carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus, has been lost. Scientists discovered in California Mono Lake bacteria that instead of phosphorus in their DNA can be used as a poisonous arsenic, according to the journal Science. This discovery, which was announced by the U.S. space agency NASA, called a breakthrough in the search for extraterrestrial life.
Found bacteria living in extreme environments saline Mono Lake in eastern California. It survives in an environment that works for other species and can be adverse to its existence, substance use, for other poisonous creatures.
Informed about the find three scientists — Felitsyya Wolfe-Simon, Paul Davis and Ariel Anbar, collaborated with NASA. Bacteria from the lake, called an acronym GFAJ-1, the researchers were left in the laboratory at all higher concentrations of arsenic. To his surprise, found that the bacteria is fully applied this item and include it in the phosphate groups of DNA. This is an absolute novelty.
The bacterium so became the first product, which showed that at the beginning of the said six elements is only possible for the emergence of life. "Our discovery shows Felitsyya says Wolfe-Simon, that life is what we know it can be more flexible than we can imagine. When here on earth can something behave so unexpected, what to expect from life, which no one has ever seen? "
The discovery of this bacteria is of great importance for astrabiyalegii and search for extraterrestrial life. Add items you need to look at the spectrum of our planet where life could exist. Astrabielyagi previously came up with the idea that life instead of water may be required to ammonia. Moreover, the assumption is that life on Earth occurred at least twice, because this bacterium is so different biochemistry, it can not be attributed to the rest of the "tree of life".