Sentences with phrase «of nucleobases»

They ended up with all of the nucleobases that make up RNA and DNA.

All the genetic information of modern life is stored in DNA as sequences of nucleobases.

However, formation of nucleobases from inorganic compounds available on prebiotic Earth had been considered to be difficult.

Pursuing the origins specifically of RNA, the close chemical relative of DNA, a research team led by Nicholas Hud, a professor in the School of Chemistry and Biochemistry at the Georgia Institute of Technology and director of the CCE, worked with a pair of potential chemical ancestors of the nucleobases of RNA.

They found the formation of a far larger variety of life's building blocks, including two kinds of nucleobases and nine kinds of proteinogenic amino acids.

With precise analysis of the products recovered after impacts, the team found the formation of nucleobases and amino acids from inorganic compounds.

«However, we know so little about how life began that we should not use the stability of nucleobases to constrain our models of Earth's temperature.»

Those peaks corresponded to seven different amino acids and 11 types of nucleobases.

Not exact matches

Beyond that, it's been thirty + years since amino acids were discovered in fallen asteroids, and just recently they've found two of the four nucleobases that form the rungs of the DNA double helix.

«Several unusual nucleobases have been found in the genomes of stem cells, which are produced by targeted chemical modification of the known building blocks of DNA.

Alan Schwartz, a biochemist at the University of Nijmegen in the Netherlands, took the idea further when he showed in 1982 that frozen cyanide, in the presence of ammonia, can form a nucleobase called adenine.

Over a quarter - century, the frozen ammonia - cyanide blend had coalesced into the molecules of life: nucleobases, the building blocks of RNA and DNA, and amino acids, the building blocks of proteins.

Many of Rick Pierson's comments are correct, in particular his identification of what scientists call the water problem: the fact that the reaction of a phosphate with ribose and nucleobases to form a nucleotide is energetically uphill in water.

Chemical analysis showed that the meteorite contains xanthine and uracil, substances called nucleobases that are necessary for RNA and DNA to form their base pairs as part of their replication process.

Martins found the answer by extracting two molecules from the meteorite: uracil, a nucleobase found in RNA, and xanthine, an intermediate in the synthesis of DNA and RNA.

Earlier researchers had detected subunits of DNA and RNA, called nucleobases, in the meteorite.

The work «nicely correlates the Late Heavy Bombardment and the energy that it delivered to Earth with the formation of RNA and DNA nucleobases from formamide», says Steven Benner at the Foundation For Applied Molecular Evolution in Gainesville, Florida.

Figuring out how adenine and uracil (nucleobases found in RNA today) combined with the sugar ribose (corresponding to the «R» in RNA) could answer one of the great questions of chemical evolution.

Nicholas Hud holds up Uracil, on the right, a nucleobase of RNA.

DNA sequencing and genome mapping can thus be compared to dividing a very long text into lots of small pieces that are read separately — letter by letter, or more exactly: nucleobase per nucleobase.

The basis for this observation is that the genomes of all organisms are written in an «alphabet» that consists of only four nucleobase molecules: adenine (A), thymine (T), guanine (G) and cytosine (C).

base (in genetics) A shortened version of the term nucleobase.

While much of the past work with DNA analogs such as PNA has focused on nucleobases already anchored to their backbone units, Ghadiri had the idea of working with simpler building blocks.