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Tag: "artificially" at biology news

A protein complex that untangles DNA

...cations on the DNA strand that the researchers had artificially damaged, suggesting that it is directly involved in the repair process. Moreover, the Smc5/6 complex also seems to be required for the disentanglement of undamaged chromosomes before cell division. If these tangles, which are a natural consequence of...

HIV-1's high virulence might be an accident of evolution

... team will examine whether SIVs carrying Nef genes artificially made incapable of limiting T cell activation might become more pathogenic in their natural monkey hosts. The group will also examine whether Nef variation among HIV-2 strains might explain differences in the rate of progression to disease in infected...

Massive duplication of genes may solve Darwin's 'abominable mystery' about flowering plants

... But the thinking was that human breeders might be artificially selecting for duplication events in crop species by "selecting desirable traits like rapid growth, high yield, and even large stature," says dePamphilis. Detection of still more ancient whole-genome duplications previously has relied on direct obser...

Scientists discover that ancient genes dictate flowering, fall bud set

...els of CO and FT genes could be made to respond to artificially imposed day length. Most importantly, they observed that under the same day length, CO and FT levels accumulated differently in trees from northern latitudes compared to those from southern latitudes. Because winter arrives earlier at northern latit...

Hair-growth drug artificially lowers PSA levels in prostate cancer screening, study finds

...rug finasteride, taken by millions of balding men, artificially lowers the results of the prostate-specific antigen (PSA) test, the standard screening test for prostate cancer, a multicenter study has found. The study, involving 308 men ranging in age from 40 to 60 years old, is available online in the British ...

Living view in animals shows how cells decide to make proteins

...differently in their natural environment versus an artificially created environment such as a laboratory tissue culture," Garcia-Blanco said. "The complexity of alternative splicing necessitates its visualization as the decisions are occurring, because taking a cell out of its context shows only its current statu...

Scientists re-grow dental enamel from cultured cells

...reason, it is exciting to consider the prospect of artificially growing enamel, or even whole teeth, using culturing and transplantation techniques. In the emergent field of tooth-tissue engineering, several groups have developed their own approaches. Although there has been some success in producing enamel-like ...

Bumblebee house warming -- it takes a village

...nce for job specialization, even when a colony was artificially forced to step up its rate of incubation, according to Sean O'Donnell, a UW associate professor of psychology and member of the research team. The researchers challenged colonies by removing their most active incubating workers and lowering the ...

UCLA/Toronto researchers unlock key to memory storage in brain

...s of the new research could prove profound. "By artificially manipulating CREB levels among groups of cells, we can determine where the brain stores its memories," he explained. "This approach could potentially be used to preserve memory in people suffering from Alzheimer's or other brain injury. We may be a...

Sunshine pill for prostate cancer in 2009

...taxotere regime so the survival rate may have been artificially inflated,' he says. He points out, however, that it may be that the Asentar will eventually prove applicable in the earlier stages of the disease. Prostate cancer is the second leading cause of cancer death in men. Prostate cancer kills one man ...

RNA enzyme structure offers a glimpse into the origins of life

...bertson said. The structure indicates that this artificially selected ribozyme uses reaction mechanisms that are much like those used by naturally occuring enzymes, Robertson said. "The L1 ligase appears to use strategies of transition-state stabilization and acid-base catalysis similar to those that exist...

Changes in amino acids in the 1918 influenza virus cut transmission

... taken from human tissue, and the third, which was artificially created in a laboratory and made to look like avian flu. One virus bound to only alpha-2,6, the second bound to both, and the artificially-generated virus bound to only alpha-2,3. The researchers were surprised to discover that the ferrets infect...

A 'traffic light' for neurons means 'go' for improving brain research

...wn the road, Deisseroth speculates, the ability to artificially stimulate neural signals, such as movement instructions, could allow doctors to bridge blockages in damaged spinal columns, perhaps restoring some function to the limbs of paralyzed patients. Finally, the technique could be useful in teasing out t...

Noise echoes in cell communications

...ations ?most obviously in treating hearing loss by artificially increasing the amount of noise in the cochlea of the inner ear, perhaps by an implanted device. Hong, Saidel and Martin applied this principle of noise to another process called "quorum sensing" ?how bacteria signal one another to act collectively...

Spud origin controversy solved

...ut also for breeders. Years of effort were made to artificially recreate the European potato from Andean landraces yet it may have originated from Chile,?said Spooner. “If the true origin of the European potato was from Chile, rather from the Andes, it shows the value of plant evolutionary studies to understand a...

New collaborative research reveals chimpanzees can sustain multiple-tradition cultures

...rative work of the last five years, showing we can artificially introduce cultures in chimpanzees, which supports the idea cultural variation observed in the wild is learned,” says Dr. de Waal. “We are the first to show cultures potentially can jump from group to group if you offer chimpanzees the opportunity to ...

Largest synthetic gene ever built offers insights into anti-malarial drug resistance

... in the past three decades. They have been able to artificially construct, and then express in yeast, a protozoan gene that contributes to such resistance. And it was no small feat. The gene they laboriously constructed over a two-year period is believed to be the largest synthetic one ever built, and it successf...

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