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Tag: "base" at biology news

ASU researchers 'wire' DNA to identify mutations

...sequence. What they found was that just a single base pair mutation in a DNA molecule, such as substitut...extremely sensitive, as the alteration of a single base in the DNA stack can either increase or decrease the conductivity of a DNA helix, depending on the t...

USC researchers track down the stem cells that create feathers

...rchers found, are well protected in the follicular base of each individual feather follicle. As they proliferate and differentiate, their progeny is displaced upward to create a feather. When the bird molts, the quill of the feather is dislodged from the follicle with a tapered proximal opening-the very f...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

... degrees Fahrenheit) warmer than that found at the base of the Greenland ice sheet, according to UC Berkeley lead researcher P. Buford Price, a professor of physics. This would be several hundred meters - some 1,000 feet - underground, where the temperature is slightly warmer than freezing and such micr...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...om Stanford University and four other institutions base their conclusion on the feeding behavior of modern and early condors and their potential prey. Writing in the Nov. 7 online edition of the Proceedings of the National Academy of Sciences (PNAS), the research team concludes that whales and seals have ...

The bioweapon is in the post

...om the chemical components of DNA (See "A dollar a base pair"). Yet some are carrying out next to no check...However, the Variola genome comprises some 190,000 base pairs of DNA, and while somecompanies will make sequences 20,000 or more base pairs long, an attempt...

Scientists sequence DNA of woolly mammoth

...lephant DNA, the researchers identified 13 million base pairs as being nuclear DNA from the mammoth, which they showed to be 98.5 percent identical to nuclear DNA from an African elephant. The project became possible through the discovery of exceptionally well preserved remains of a mammoth skeleton in t...

'Perception' gene tracked humanity's evolution, scientists say

... said. "We found that in a stretch of DNA about 68 base pairs in length upstream of prodynorphin, 10 percent of the sequence was different between us and chimps." Hahn said this "evolutionary burst" is responsible for differences in gene expression rates. When induced, the human prodynorphin gene was 20...

Did feathered dinosaurs exist?

...he existing literature and furthered the knowledge base with additional experiments. Theagarten Lingham-Soliar of the University of KwaZulu-Natal in South Africa examined the skin of modern reptiles, the effects of decomposition on skin, and the fossil evidence relating to alleged feather progenitors (pro...

DNA self-assembly used to mass-produce patterned nanostructures

...eks to get an answer." The answer for the optimal base configurations for each DNA strand was disclosed to Duke's Office of Licensing and Ventures as a first step towards a potential patent. The researchers have not yet produced a functional circuit on a grid. However, in future studies, they plan to ge...

Study Unlocks Insects?Secret for Love in the Dark

... investigate this, the group turned to a knowledge base compiled by Ingenuity Systems, Inc. of Mountain View, Calif., that includes 200,000 published reports on more than 8,000 human, rat and mouse genes and their genetic interactions. This tool enabled the group to uncover about 300 genes and several gen...

Study reveals genomics of inflammation from severe injury

... investigate this, the group turned to a knowledge base compiled by Ingenuity Systems, Inc. of Mountain View, Calif., that includes 200,000 published reports on more than 8,000 human, rat and mouse genes and their genetic interactions. This tool enabled the group to uncover about 300 genes and several gen...

Life in deadly conditions

...helt. This information is made of some 2.6 million base pairs (about one thousandth of the human genome), and encodes the synthesis of 2,843 proteins. Natronomonas pharaonis has to deal with two different kinds of life-threatening conditions. It was found in pools which are strongly alkaline (pH-value of...

UF study first to quantify validity of DNA I.D. tool using marine snails

...l tissue or blood and compare it with a known data base ?has attracted widespread attention with its promise as a valuable aid in species identification and discovery," said Christopher Meyer, a UF biologist and one of the researchers. "However, few comprehensive datasets are available to test its perform...

DNA size a crucial factor in genetic mutations, study finds

...re each rung consists of two molecules that form a base pair. DNA has four bases: adenosine (A), thymine (...s along the template and selects the corresponding base to create a new base pair. DNA bases fit into a specialized site on the enzyme before they are bond...

A step toward the $1,000 personal genome using readily available lab equipment

...on on the genetic sequence, depending on which DNA base is present. The fragment then shines with one of t... that reinterpret the data as a linear sequence of base pairs. In their study, the researchers matched the sequence information against a reference genome,...

Oceans turning to acid from rise in CO2

...lankton, some of the most important players at the base of the planet's food chain. "We can predict the magnitude of the acidification based on the evidence that has been collected from the ocean's surface, the geological and historical record, ocean circulation models, and what's known about ocean chemi...

New book expands biological classifications to account for 'alien' life

...ormed to cover life discovered to have a different base than DNA or RNA. The dominions would be placed within broader classifications called "arborea," which contain life that does not mix with that of other arborea. The Earth arborea would contain all life forms found on this planet and other arborea wo...

NHGRI expands effort to revolutionize sequencing technologies

...till costs about $10 million to sequence 3 billion base pairs ?the amount of DNA found in the genomes of h...es act together as direct molecular sensors of DNA base identity. The key to the system is the interaction between a fluorescent polymerase and the nucleoti...

Elusive salamanders have role in developing new sampling models

Rare salamanders at a Georgia military base are the guinea pigs for Oak Ridge National Laboratory researchers whose goal is to develop methods to better determine whether a species has vanished. After not finding any flatwoods salamanders since 2001, Fort Stewart biologists were a bit concern...

Molecular mechanism of feather formation found

...uiting new cells, which proliferate at the growing base of the feather germ, to join the base of that barb ridge," Harris says. "The variations in the initial number of barb ridges will directly...

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