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Tag: "picture" at biology news

Scientists reveal structure of gateways to gene control

...o for the first time, researchers now have a clear picture of how H2A.Z nucleosomes help to control whether o...xpression. "Our study has provided a much clearer picture of the architecture of the DNA in the control regions, allowing us to understand much better how gen...

Faster, low cost sequencing technologies needed to drive era of personalized medicine

...l's genetic makeup. Any patient wanting a complete picture of their inherited DNA, or genome, would drop their jaw at the sight of the bill -- to the current tune of $10 million or more charged for every human or mammalian-sized genome sequenced. Now, with a grant award from the National Human Genome Resear...

Global map shows new patterns of extinction risk

...nto small grid squares to obtain a really detailed picture of biodiversity. By looking at the numbers of enda...se squares, we have been able to see how this real picture varies from assumptions that have previously been made about global biodiversity of endangered speci...

Penn researcher shows that DNA gets kinky easily at the nanoscale

... the contours of the molecule in order to create a picture of its structure. With this tool, Nelson and his colleagues measured the energies required to make various bends in DNA at lengths of five to 50 nanometers --- about a thousand times smaller than the diameter of a typical human cell. ''We found t...

Living view in animals shows how cells decide to make proteins

...s in living organisms provide a much more complete picture of how genes and proteins behave than do experiments using cells in culture." Until 20 years ago, scientists believed that a single gene made a single protein. With the discovery of alternative splicing, it became clear that one gene can produce ...

Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity

...damaged DNA. Kornberg’s group captured the first picture of the polymerase II transcribing complex by X-ray crystallography in 2001. Those structures revealed the complex with a nucleotide still in the enzyme’s addition site, just after it had been added to the RNA transcript. Later X-ray structures reve...

Math model predicts cancer behavior

...r's shape and its composition. "What we get is a picture of cells that are evolving and growing within a microenvironment," Quaranta said. "The nice thing about computer simulations is you can create ‘what if' scenarios: what if we make the oxygen very high, what if we turn oxygen off in the middle of tumo...

Uncovering DNA's 'sweet' secret

...homo-DNA was first synthesized in 1992, a detailed picture ofthe molecule's structure had been lacking. Egli's high resolution structure is now able to provide answers to some of the lingering questions about why DNA is made the way it is. While the homo-DNA structure shows a number of similarities with DN...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...global dominance. Dodson, however, warns that the picture of the fossil record at the time of extinction is not resolved enough to say definitively. "We have enough information to say for certain that, within six million years of the meteorite's arrival, dinosaur populations were stable," Dodson said. "But...

Anticipation plays a powerful role in human memory, brain study finds

...but the other indicated that some type of gruesome picture was soon to follow, such as explicit photos of bloody, mutilated bodies.Thirty minutes after the researchers had shown dozens of violent images, they quizzed study participants on how well they remembered the pictures they had just seen. "We found...

Sequencing of the oyster mushroom genome

... enables us to obtain an overall and more enriched picture of the evolution of life on Earth. In the second year of the project, the reading of the genome will be completed and the annotation of the genes perfected. In the end, all the information will be placed at the disposal of the scientific communit...

Designer babies - what would you do for a 'healthy' baby?

... to be healthy," said Dr. Hampton. "However, the picture is complicated by the shifting meaning of 'healthy' and confusion about when the manipulation of children's physical, psychological or social characteristics is legitimate, natural or ethical." We are often presented with information and speculatio...

New technique boosts size of proteins that can be analyzed

... from a sample, but it does not provide a complete picture of each protein. The top-down approach, on the other hand, measures the whole protein and thus provides more confident identifications; it is also better at revealing modifications and mutations, where there might be a mistake or addition in the sequ...

Fast-freeze snapshot yields new picture of nerve-muscle junction

...and immuno-gold staining, now provides an accurate picture of where these synaptic proteins cluster -- information previously unknown to scientists. Co-author Robby Weimer, a post-doctoral fellow at the Cold Stream Harbor Laboratory in New York, developed the high-pressure freeze technique to view synapses...

Fast test for low blood flow in dogs detects early heart trouble

...build a three-dimensional image of the heart. The picture is so good, researchers say, it decreases the need for invasive, more risky procedures, such as angiograms or cardiac catheterization, to check for arterial blocks. More than 1 million Americans undergo cardiac catheterization each year, and the ...

End of deforestation in view? Experts advance new way to size up global forest resources

...arbon within the area. It produces an encouraging picture of Earth's forest situation and may change the way governments size up their woodland resources in future. Devised by six distinguished international academic and non-governmental experts in forestry science and economics, the "Forest Identity" ...

Taking 'chips' to the next level of gene hunting

...h standard chips, we're missing a big piece of the picture of mutations in humans because they look only at the meaty parts of genes, but the human genome is only 3 percent meaty parts," says Jef Boeke, Ph.D., Sc.D, professor of molecular biology and genetics and director of the HiT (High Throughput Biology ...

Biologists probe the machinery of cellular protein factories

...t an atom-by-atom model of the ribosome. The new picture shows details never seen before and suggests how certain parts of the ribosome move during protein synthesis. A paper describing the new findings will be published in the September 22 issue of the journal Cell and is currently available online. "W...

Particle size matters to bacteria ability to immobilize heavy metals

...ontaminated DOE sites. "It will help build a whole picture of Shewanella ?how it reacts with metal oxides and how the rate of this interaction is influenced by size" Bose said. So far, the research shows that particles of similar shape but different size down to 10 nm show a 10-fold difference in bioreduct...

Coral stress 'like never in history'

...s around the world in order to help build a bigger picture of how the world’s reefs have survived devastation in the past ?so that managers can help them continue to survive into the future....

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