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Tag: "relatives" at biology news

UNC scientists discover new role for protein as fundamental inhibitor of cell movement

..." she added. The other activators of PAK1 include relatives of the notorious Ras family of tumor promoters, the GTPases Rac and Cdc42. CIB1 activation of PAK1, however, is different from these GTPases. "CIB1 activates PAK1 before Rac and Cdc42," said Dr. Leslie V. Parise, UNC professor of pharmacology, membe...

Defective Gene Linked to Two Inherited Immune Deficiencies

...duals with TACI mutations, they found all four had relatives with the same mutations. Eleven of the 12 identified relatives with CVID or IgA deficiency reported a history of recurrent infections and were also found to have l...

Agreement will speed research on microbicides for women

...duals with TACI mutations, they found all four had relatives with the same mutations. Eleven of the 12 identified relatives with CVID or IgA deficiency reported a history of recurrent infections and were also found to have l...

Biologists Crack Genetic Code for Specialized Spider Silk

...duals with TACI mutations, they found all four had relatives with the same mutations. Eleven of the 12 identified relatives with CVID or IgA deficiency reported a history of recurrent infections and were also found to have l...

Independent researchers confirm the existence of ivory-billed woodpecker

...ith the behavior or the Central and South American relatives of the Ivory-billed Woodpecker." These recordings provide the first evidence of the existence of more than one individual Ivory-bill. Cornell researchers plan to release the recordings at a meeting of the American Ornithologists' Union in Santa Barb...

Human cerebellum and cortex age in very different ways

...rom our own suggests that our closest evolutionary relatives may use their brains very differently than we do," Plotkin says. "It appears that genome-wide patterns of aging evolve very rapidly." The scientists say their results may cast some doubt on the effectiveness of mice and other species to model variou...

NIAID researchers show how promising TB drug works

...nformation they can use to produce improved PA-824 relatives and accelerate the pace of new TB drug development. ...

Why Christmas trees are not extinct

..., torus-margo valves evolved in conifers and their relatives no later than 220 million years ago, Sperry says. Flowering plants evolved at least 146 million years ago and retained inefficient valves that first appeared some 400 million years ago in ferns, cycads and other primitive plants. But flowering plan...

Ancient trans-Atlantic swarm brought locusts to the New World

...red a long-standing conundrum: why are the closest relatives of the African desert locust (Schistocerca gregaria) found in the New World, rather than Africa? The desert locust is one of the world's most economically important insects, and is capable of forming massive swarms that devastate crops. DNA shows th...

Finding rewrites the evolutionary history of the origin of potatoes

...suggests that potatoes were domesticated from wild relatives by indigenous agriculturalists more than 7,000 years ago, says Spooner. Today, the potato - an international dietary staple - is a major crop in both the United States and in Wisconsin, which is fourth in the nation for potato production. Potato ...

Scientists narrow the time limits for the human and chimpanzee split

...nt common ancestor of humans and their closest ape relatives -- the chimpanzees -- lived. Scientists at Arizona State and Penn State Universities have placed the time of this split between 5 and 7 million years ago -- a sharper focus than that given by the previous collection of molecular and fossil studies, ...

Algal protein in worm neurons allows remote control of behavior by light

...e to chemicals or electrical signals, ChR2 and its relatives are controlled directly by certain wavelengths of light, making them ideal for remote control in the laboratory. In their experiments, the researchers took advantage of the light sensitivity of the algal channel protein by introducing expression of ...

'Banana-jawed' fossil mammal linked to rare sound-producing skill

... speculation is correct, Thryohyrax and its fossil relatives would be the only mammals found so far to use such a skeletal structure for producing sound, the researchers said. They added that some dinosaurs are thought to have used similar sound-producing mechanisms. The researchers published their findings i...

Oceans are 70 percent shark free

...e depth of the oceans is 4,000m and bony fishes - relatives of cod - thrive down to around 9,000m depth. Scientists do not know why sharks are absent from the deep but suggest one possible reason could be due to lack of food. They warn their finding has environmental implications. Professor Monty Priede,...

Genome sequencing is for ecologists, too

... genetic models of insects, which are evolutionary relatives of crustaceans. "The genome sequences are being completed for several insects because they are important model organisms -- like fruit flies -- or because they are important in disease or agriculture," said Jeffrey Boore, head of the evolutionary ge...

Cuttlefish masters of disguise despite colorblindness

...and sizes of objects. Cuttlefish are cephalopods, relatives of octopuses and squid, and are found in all marine habitats worldwide; they are particularly abundant around coral reefs and temperate rock reefs in which the visual habitat is richly varied. Cephalopods can change their appearance with a speed and ...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

...osaurs known as coelurosaurs that were the closest relatives of modern-day birds. "It's not only the oldest tyrannosaur but also the sexiest," Erickson said, what with its flashy crest atop its small head –?an extravagant ornament likely used only for attraction and display purposes and the first of its kind ...

'Scent of a woman' tells male redback spiders to find a mate

...exual and natural selection." Redback spiders are relatives of black widow spiders and the marble-sized female redbacks dwarf the males, who are about the size of a grain of rice. While the females can live for up to two years, males live for only four to eight weeks. Initially, they remain on the web where t...

NHGRI announces latest sequencing targets

...s and fungi along with some of their single-celled relatives providing, for the first time, comprehensive data to fill gaps in our understanding of animal and fungal evolution. Recent research has shown that some genes in the human genome that are responsible for early animal development arose much earlier tha...

For diseases, when it comes to sharing a home, only close relatives will do

Being more generous to close relatives is a common theme in both our daily interactions a...uld," says Koskella, "sharing resources with close relatives and being more competitive towards non-relatives." According to current evolutionary theory, the c...

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