Sentences with phrase «small chemical groups»

It was established that the addition or removal of several small chemical groups to or from DNA could affect gene expression.

While it has been understood for some time now that tRNAs are heavily decorated with small chemical groups such as methyls (carbon atoms bound to three hydrogens), the unprecedented discovery that one of these modifications can be removed suggests that tRNA has a regulatory role in the process of protein translation through chemical changes in itself.

One type of epigenetic change to the genome occurs when small chemical groups glom on to the ladder structure of DNA.

Histone proteins have long polypeptide tails that can be modified by the addition and removal of small chemical groups.

Histone proteins can be modified with small chemical groups, many of which are products of cellular metabolism.

When newly hatched majors were injected with molecules that increased the number of small chemical groups attached to their DNA's protein scaffolding, they behaved like minors.

Epigenetic effects include modification of DNA by incorporation of small chemical groups, methyl groups.

«Tiny details have amazing effects: A slight change in the substrate, like the removal of a small chemical group, is sufficient to practically stop the reaction.»

Not exact matches

I refer here to the small group of scientists who argue that in fact there is no qualitative difference between living organisms and other chemical processes.

Starting just before conception, Jirtle and Waterland fed a test group of mother mice a diet rich in methyl donors, small chemical clusters that can attach to a gene and turn it off.

Environmental groups criticize the EPA, which was granted the authority by Congress in 1996, for taking so long to order manufacturers to test only a small group of chemicals.

Yes, the threat of war between major powers has declined, he notes, but the ability of small groups or even individuals to wreak enormous havoc — with nuclear, chemical, or biological weapons, not to mention jumbo jets — has grown.

Yale scientists have found a way to rewire the behavior of an important group of small molecules involved in the synthesis of carbon - to - oxygen chemical bonds.

Boyden said there is considerable interest in brain regions that are important for learning or addiction — learning gone wrong — with particular attention to small groups of neurons deep in the brain that manufacture dopamine, a chemical transmitter involved in regulating communication between neurons.

However, a group of Dutch scientists has discovered that if aphids are exposed to the active chemical present in their «alarm» pheromone, they emerge from the lettuce hearts and can be killed by relatively small doses of insecticide (Journal of Applied Entomology, vol 115, p 432).

But some bacteria have evolved a counter strategy — injecting special proteins that suppress the plant's immune response by adding small, disabling chemical tags called acetyl groups to immune molecules.

New research at Rockefeller University, published March 18 in Nature, reveals how cells sort out the loops meant to encode small RNAs, known as microRNAs, by tagging them with a chemical group.

They also support the existence of four related subtypes based on the patterns of DNA methylation — a chemical reaction in which a small molecule called a methyl group is added to DNA, changing the activity of individual genes.

This single location blockbuster is set in the near feature where a chemical reaction creates a new ice age, survived only by a small group of people aboard a sophisticated train that travels around the world on an endless loop.

• 20,000 + feet of climate - controlled play, event and community space • 13,000 sq. ft. of K9 grass in separate large & small dog areas (made entirely of recycled materials with built - in, anti-microbial properties) • A 98 % chemical - free indoor swimming pool with ozonated and naturally filtered water • Comfortable overnight boarding in spacious rooms • Self grooming area with tools and supplies provided • Specialty pet care products and services • Social, sports and educational events • Internet webcams • Ask about our group meeting spaces!

[4] In it, Hileman described «a systematic campaign of disinformation» being conducted by a small group of scientists calling themselves the Global Climate Coalition (GCC) whose work is funded by coal, oil, utility, automobile, and chemical companies — the corporations whose profits might decline if Congress took global warming seriously.

In explaining that «[m] any thoughtful and decent people are conflicted about, or strongly oppose, this research,» President Obama was acknowledging that, even in its earliest stages, the small group of cells that constitute an embryo are in some way different from a chemical reagent to be sold in a catalog or an industrially synthesized molecule to be integrated into a widget.