Tag: "loop" at biology news
Researchers watch antibiotics, bacteria meet at atomic level
...lock of DNA or RNA) to the growing RNA chain. This loop
must open again to allow the next cycle to happen. If something such as an antibiotic keeps the loop
from closing, RNA polymerase can't properly function and stalls. This loop
is a target for antibio...
Recycling is not enough -- we need to consume less
...olition waste. We should develop more closed loop
systems for organic wastes, for instance by returning composted food waste to the land as fertiliser, rather than losing this valuable resource. ...
Salty oceans provide early warning for climate change
...rounding areas, and initiates an ocean circulation loop
called thermohaline overturning. The scientists discovered that a build up of salt in the waters off the coast of South Africa could help to speed up ocean circulation in the North Atlantic, despite the two areas being thousands of kilometres apart...
Research finds evidence tropical cyclones have climate-control role
...lculations. It means there may be another feedback loop
in the climate system, and that is significant." Huber and Sriver studied the cooling effects of hurricanes from 1981 to the present using the cold wakes that follow a hurricane. "These cold wakes can be easily observed," Sriver said. "The typica...
Executable biology -- Computer science sheds light on animal development
...signaling pathways, as well as a negative feedback loop
that had not been described before. These kinds of models hold great promise for future exploration of a variety of biological systems, explains lead EPFL researcher and biologist Dr. Jasmin Fisher. "Once a robust model has been built of a particu...
Arctic ice retreating more quickly than computer models project
... sunlight and increase temperatures. This feedback loop
has played a role in the increasingly rapid loss of ice in recent years, which accelerated to 9.1 percent per decade from 1979 to 2006 according to satellite observations....
2-protein team would be lost without each other
...lexes in a cell of the endodermis forms a feedback loop
with the genes to ensure that the plant keeps making enough Scarecrow to bind up all the arriving Short-root. Benfey and Cui have found this same restraint and feedback mechanism at work in the root tips of rice, and they believe it is the reason t...
Decoy pill saves brain cells
...tive in such a way as to start a positive feedback loop
that leads to ever-higher levels of calcium and co...continue. In addition, it interrupted the feedback loop
that stoked calpain activation. "This is potentially a treatment for any conditions that involve t...
Protein's tail may be flu virus's achilles heel
...f. "There is a small binding pocket for the tail loop
of the protein that appears to be a promising targ... know from previous genetic studies that this tail loop
is almost identical across strains of influenza A, so drugs that target the tail have a high potenti...
NIH Nanomedicine Center draws on NYU School of Medicine expertise
...ymes cut it at that looped spot, and then hold the loop
in place. The gene segments at that location are t...is known. The proteins that orchestrate the DNA loop
formation are recombination-activating gene proteins called RAG1 and RAG2. In their controlled exper...
Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity
... that a portion of the enzyme known as the trigger loop
acts like a trap door, swinging beneath a matching...teractions leave another side chain in the trigger loop
precisely positioned, such that it may literally trigger the formation of the chemical bonds that li...
A human taste for rarity spells disaster for endangered species
...g rarity, they found, triggers a positive feedback loop
between exploitation and rarity that drives a species into an extinction vortex. This phenomenon, the authors explain, resembles an ecological process called the Allee effect, in which individuals of many plant and animal species suffer reduced fitn...
UGA scientists discover bacterial 'switch gene' that regulates oceans' sulfur emissions into the air
...cess," she said. This flow provides a key feedback loop
in theories of global climate regulation for which biotic processes are central elements. The researchers discovered that the bacterioplankton in the Roseobacter and SAR11 groups are the primary plankton involved with directing DMSP away from DMS a...
Insights into activity-dependent neuronal growth through RSRF-supported research
...ss. Moreover, they identified a complex regulatory loop
in which BDNF feeds back to trigger phosphorylation of MeCP2, suggesting that BDNF and neuronal activity may cooperate in regulating MeCP2 function. Finally, this study shows that MeCP2 phosphorylation at S421 occurs only in the brain and not in othe...
One protein, two channels: Scientists explain mechanism in aquaporins
...ange in one of the aquaporin loops (loop D). "This loop
is very flexible, has four positively charged argi...khorshid said. "We believe the cGMP interacts with loop
D, facilitating its outward motion, which triggers the opening of the gate." The work highlights a c...
Silence of the amoebae
...could be prevented by inserting a plasmid (a small loop
of DNA) containing a copy of a specific part of that gene into the amoeba cell nucleus. Introducing the plasmid led to the modification of DNA "packing" proteins, causing the DNA-protein packages to become more tightly coiled something like a tangle...
Study finds how organs monitor themselves during early development
...gical terms this question could involve a feedback loop
that lets the body check in on itself and then act... Medicine have unraveled the signals in a feedback loop
governing ovarian development. This work has been several years in the making and is being published...
Mitochondrial DNA sequencing tool updated
...as been hard to know. Now, you can sequence the D loop
so readily and begin to look harder for associations in certain cancers."...
Invasive species alter habitat to their benefit
...st that invasive cattails set in motion a feedback loop
that helps them gain a stronghold. "The invasive cattails change the ecosystem through litter accumulation, producing an environment in which native plants don't perform well but the invaders do," said Farrer. "As the environment changes, the cattail...
Surprise finding for stretched DNA
...the helix. These proteins are known to bend, wrap, loop
and twist DNA. Now it has been shown that they can achieve their goals by simultaneously stretching and overwinding a DNA molecule, or by compressing and underwinding it. "We believe that our work sheds new light on an old and important problem," ...
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