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Tag: "unusual" at biology news

Man and mouse share genome structures

...analysis tools. Most exciting to Bernstein is the unusual density of histone tags spread over the regions of genome containing the HOX genes, which are key regulators of development. "In most of the genome, we see short stretches associated with activated histones," Bernstein said. "However, in the HOX reg...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

...cidtransporter.Varki noted that this pathway is an unusual and previously unknown onethat may also be relevant to the entry of other small molecules intocells. In addition, the JBC study showed how Neu5Gc attached to dietaryproteins from animals could be incorporated into cells lining thestomach and colon, o...

Genome of deadly amoeba shows surprising complexity, evidence of lateral gene transfer

...entification of these genes sheds new light on the unusual shared biology between the parasitic amoeba and an...nts, which are processed by the parasite. Another unusual feature of the genome is the presence of an unprecedented number of tRNA (transfer RNA) genes, which...

New Clues Add 40,000 Years to Age of Human Species

...al fossils. The researchers then came across an unusual resource: unused film footage taken by National Geographic photographers for a never-aired documentary on the original expedition. By matching features such as hills from the film to landmarks in the field, together with a hand drawn map from the la...

Enzyme allows B cells to resist death, leading to leukemia

... Lyn was markedlyoverexpressed in CLL cells and an unusual amount of the enzyme wasfound in the cell cytosol. In addition, the enzyme was constantlyactive compared with levels of activity in normal donor cells.The authors went on to show that inhibition of Lyn was able to restorethe process of cell apoptosis...

ASU researchers finds novel chemistry at work to provide parrot's vibrant red colors

...entury, biochemists have known that parrots use an unusual set of pigments to produce their rainbow of plumag...s and benefits to becoming colorful. "Parrots are unusual among birds, in that they almost without exception display fantastic colors but exhibit very little ...

Transport System Smuggles Medicines Into Brain

...entury, biochemists have known that parrots use an unusual set of pigments to produce their rainbow of plumag...s and benefits to becoming colorful. "Parrots are unusual among birds, in that they almost without exception display fantastic colors but exhibit very little ...

Researchers trace evolution to relatively simple genetic changes

...th, and couldn't sweat in hot weather. It's a very unusual constellation of symptoms, and is passed as a unit through families." Research had already shown that the Eda gene makes a protein, a signaling molecule called ectodermal dysplasin. This molecule is expressed in ectodermal tissue during development ...

Scientists reveal molecular secrets of the malaria parasite

... and scientists in Leiden identified evidence ofan unusual method of gene regulation (called post transcriptionalregulation) at the transition between the vertebrate host and themosquito. That motif regulates proteins that are switched on as theparasite enters the mosquito.Hall's group identified the gene re...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...th, and couldn't sweat in hot weather. It's a very unusual constellation of symptoms, and is passed as a unit through families." Research had already shown that the Eda gene makes a protein, a signaling molecule called ectodermal dysplasin. This molecule is expressed in ectodermal tissue during development ...

Scientists discover unique microbe in California's largest lake

...arch associate when he first noticed theorganism's unusual lime-green color."I knew right away there was something unusual about itsphotochemistry," Miller recalls."We purified the pigments from the strain and saw that they...

Falling ants glide back to trunk to avoid dangers of forest floor

... the ants to reorient in midair. They also have an unusual flattened head with flanges that could act as a rudder, Dudley said. "My guess is that, by gliding backwards and using their legs and also their flat head with flanges, they could steer," he said, though more studies are needed before the question c...

Vampire bats keep out of trouble by running

...oriented" vampire bats. Not only are vampire bats unusual because they run, but also in the way that they power their gait. "Unlike most animals which use their hind legs as a source of power, these exceptional creatures power their run with their forelimbs," Hermanson explains. Getting most of the push fro...

Chemists identify immune system mechanism for methamphetamine binges

...etamine and boost tolerance to the drug through an unusual vaccine-like mechanism. Their finding, if confirmed in human studies, could help explain why chronic users go on long binges with the illicit drug, also known as speed. The study could lead to new treatments for the drug's addiction, they say. Recen...

Controlling protein diversity

...in is made," said O'Malley. These coactivators are unusual in that they can both control alternative splicing that results in different proteins being made as well as the production of RNA. ...

Researchers uncover sequence of major rice pathogen

...t of secreted proteins, including those defined by unusual carbohydrate-binding domains. This fungus also possesses an expanded family of G-protein-coupled receptors, several new virulence-associated genes, and large suites of enzymes involved in secondary metabolism. Consistent with a role in fungal pathoge...

Leprosy microbes lead scientists to immune discovery

With the unusual opportunity that human leprosy infections provide for study of human immune responses, scientists have discovered how the body's early warning system prompts a rapid immune response by two separate armies of defensive cells. The finding helps explain...

Physiological effects of reduced gravity on bacteria

...voured bacteria that were able to thrive under the unusual environmental conditions of this habitat. Responses to reduced gravity, coupled with impacts of other features (such as radiation resistance and the ability to persist under very low nutrient conditions), may contribute to the success of these water ...

Africa to take it on chin again with climate change

...e, the recent African dryings appear to be neither unusual nor extreme," says Hurrell. Monsoon rains, critical to life in much of Africa, shift north and south with the seasons. They normally reach the Sahel from July to September and the southern part of the continent from February into April. Low-pressure...

Friendly bacteria in humans may protect against HIV

...owever, we needed to find bacteria that prefer the unusual sugar mannose and thus can capture it." To identify bacteria that target mannose, Tao and his colleagues isolated oral and vaginal lactobacilli from healthy humans and tested the ability of different strains to bind to baker's yeast, another microor...

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