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Tag: "striking" at biology news

Common enzyme is a key player in DNA repair

...base pair in the new chromosome. "It was a pretty striking result," Walker said. "Not only did DinB copy over the damaged G nucleotide, it was 10 to 15 times better at copying the damaged G than copying the undamaged G. Up until now, it didn't look like that useful a polymerase." Experiments led by MIT gra...

For some young fish, early gene expression is a clear harbinger of fated lifestyle

...populations. The findings also indicate that such striking differences in gene expression profiles are probably controlled by only a few major genes. In addition, the authors showed that while there is a large diversity in gene expression levels between individuals from the same population, the different ex...

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

...mes begin to form," Ferree said. One of the most striking aspects of this mechanism is the large number of accessory nuclei and centrosomes that form in the developing eggs of these Hymenopteran insects. "You only need two centrosomes, and they make hundreds of them. So they go through a lot of work to mak...

Researchers now able to look deep into heart to view triggers of a heart's beat

...mes begin to form," Ferree said. One of the most striking aspects of this mechanism is the large number of accessory nuclei and centrosomes that form in the developing eggs of these Hymenopteran insects. "You only need two centrosomes, and they make hundreds of them. So they go through a lot of work to mak...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

...ientists identify a new genus and species. Despite striking skeletal differences and only subtle similarities, the FSU researcher determined that the two remarkably intact specimens were cousins of North America's hulking Tyrannosaurus rex. Make that distant cousins –?the newfound, relatively diminutive 10-f...

Insects and mammals share common fat-building pathway, study suggests

...ociated with aging, they suggest. "As we age, two striking things tend to happen almost across the board--our bones become thinner and we gain fat," said senior author, Jonathan Graff of the University of Texas Southwestern Medical Center. "Our findings are consistent with the idea that hedgehog signaling ma...

Where 'jumping genes' fear to tread

... are involved in developmental processes. Another striking feature of TFRs was that they are associated with ultra-conserved regions, or genomic segments longer than 200 base pairs with 100% identity between human, mouse, and rat. All of these observations strongly support an important role for TFRs in crit...

Secrets of the sea yield stronger artificial bone

...affolding composed of hydroxyapatite that exhibits striking similarities to nacre's multilayered structure across a wide range of length scales. Like nacre, the surface of each layer is rough, helping the layers lock in place with whatever substance fills the space between them. And some bridges form between ...

Trial success for diabetic nerve therapy

...he data in the paper demonstrate, we have had some striking success." The US clinical trials ?carried out by Professor Tomlinson's collaborators at biotech firm Sangamo BioSciences Inc ?have also been encouraging with the only adverse event reported being mild injection-site reaction in four of the 12 diabet...

Attacking cancer's sweet tooth is effective strategy against tumors

...olytic pathway did not survive beyond 10 weeks. In striking contrast, only two of the LDHA-deficient mice died, one at 16 weeks, another at just over 18 weeks. Eighty percent of the mice outlived the four month experiment. The findings by Valeria Fantin, Julie St-Pierre, and Philip Leder appear in the June Ca...

In-home sensors spot dementia signs in elderly

...thy counterparts. This inconsistency was "the most striking difference between the groups. Even with as few subjects as we had, the groups were clearly separated by the variability of these measures," Hayes noted. Differences were detectable after only four weeks of monitoring. Such differences often are le...

Stanford snake venom study shows that certain cells may eliminate poison

... literature, Metz noticed that endothelin-1 bore a striking similarity to sarafotoxin 6b, the most toxic component in the venom of the burrowing asp, or Israeli mole viper. Knowing also that mammalian mast cells had been shown to respond to many snake venoms by secreting some potent biologically active mediat...

Rice scientists unveil 'nanoegg'

...ll, nanoeggs are asymmetric specks of matter whose striking optical properties can be harnessed for molecular imaging, medical diagnostics, chemical sensing and more. Nanoeggs are described in the July 18 issue of the Proceedings of the National Academy of Sciences. Like nanoshells, nanoeggs are about 20 ...

How HIV 'exhausts' killer T cells

...estored helper T cell function. "This was the most striking finding, because the majority of patients we have studied had no detectable levels of these HIV-specific cells; but as soon as we blocked the PD-1 pathway, they had a ton of them," said Walker. The researchers' discoveries could lead to immedi...

A new tool against brain disease

...estored helper T cell function. "This was the most striking finding, because the majority of patients we have studied had no detectable levels of these HIV-specific cells; but as soon as we blocked the PD-1 pathway, they had a ton of them," said Walker. The researchers' discoveries could lead to immedi...

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

...hers is the first to offer an explanation for this striking difference. The group found that a viral protein earlier shown to help the virus evade the immune system, thereby allowing the SIVs that infect monkeys to persist and multiply with high efficiency, also has a protective role in the host immune syste...

Jellyfish dominate fish in over-harvested Namibian waters

...ir work, less formal observations had pointed to a striking change over time--for example, jellyfish are now so numerous in the region that they significantly interfere with fishing operations and industrial water-uptake systems. In addition, large jellyfish species such as Chrysaora hysoscella and Aequorea f...

How did cactuses evolve?

...t cactus. "The cactus form is often heralded as a striking example of the tight relationship between form and function in plants," write the authors. "A succulent, long-lived photosynthetic system allows cacti to survive periods of extreme drought while maintaining well-hydrated tissues." Recent molecular ...

UCLA study finds same genes act differently in males and females

... gender and the amount of gene expressed. "We saw striking and measurable differences in more than half of the genes' expression patterns between males and females," said Dr. Thomas Drake, co-investigator and UCLA professor of pathology. "We didn't expect that. No one has previously demonstrated this genet...

The higher the hierarchy, the greater the aggression

...al variation in social behavior is one of the most striking features of cooperative animal societies. In a new study from the June issue of American Naturalist, Michael A. Cant (University of Cambridge), Justine B. Llop (University of Cambridge), and Jeremy Field (University College London) investigate the ex...

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