Tag: "unusual" at biology news

Short chromosomes put cancer cells in forced rest

...op growing, a process known as senescence. In an unusual set of experiments, the research team first mated mice with nonoperating telomerase to mice carrying a mutation that predisposed them to Burkitts lymphoma, a rare but aggressive cancer of white blood cells. Telomerase helps maintain the caps or ends ...

'Junk' DNA now looks like powerful regulator, Stanford researcher finds

...ular engineering at UC-Santa Cruz, are remnants of unusual DNA pieces called transposons that duplicate themselves and hop around the genome. "We used to think they were mostly messing things up. Here is a case where they are actually useful," Bejerano said. He suspects that when a transposon is plopped d...

Will lemmings fall off climate change cliff?

...ing temperatures. Also, the tundra is experiencing unusual warm periods in winter, including freezing rain and episodes of thawing and freezing, which can coat much of the lemmings' foods (sedges and dwarf shrubs) in ice. Lemming predators also have to adapt to these changes. Predators that specialize on...

New way to catch cancer's spread, rapid 3-D retinal imaging, more at CLEO/QELS 2007

...tion a phenomenon that causes light to bend in an unusual way from its theoretical conception in the 1960s to its eventual experimental verification this past decade. He will discuss applications of negative refraction, such as efforts to create a "perfect lens" and cloaking devices, as well as progress on...

DNA sequence of Rhesus macaque has evolutionary, medical implications

...said Milosavljevic, "giving us new evidence of the unusual role of this sex-chromosome in primate evolution." The data herald a new era where reagents can be tailored specifically for the rhesus macaque. "In the future, we hope to develop DNA microarrays or gene chips specific to the macaque, which will ...

Evolution of symbiosis

...cells. Such interdependent relationships are not unusual in the natural world. What is unusual, report Helen Dunbar, Nancy Moran, and colleagues in a new study published this week in the open access journal PLoS Biology, is that a single point mutation in Buchnera's genome can have consequences for its aph...

Why small dogs are small

...s known to produce small mice and was linked to an unusual case of a tiny person. But to turn suspicion into fact, many more breeds had to be examined. So the study eventually expanded the genetic analysis to 3,241 dogs from 143 breeds, ranging from small ones like bichon frise, Chihuahua, Maltese, Pomera...

Want to monitor climate change? P-p-p-pick up a penguin!

...ng about the effects of climate change in terms of unusual animal behaviour, such as altering patterns of fish and bird migration. However, scientists at the University of Birmingham are trying out an alternative bio-indicator the king penguin to investigate whether they can be used to monitor the effects ...

Mutation in HNF4A associated with an increase in birthweight and macrosomia

...rth. Although this study is in patients with an unusual mutation, these results have wider implications as they establish that HNF4A is important in determining birthweight. However, the mechanism by which the same mutation also causes diabetes (ie with decreased insulin) in later life remains to be deter...

Protein averts cell suicide but might contribute to cancer

...LUMBUS , Ohio -- Scientists have discovered how an unusual protein helps a cell bypass damage when making new DNA, thereby averting the cell's self-destruction. But they also discovered that this protein, an enzyme called Dpo4, often makes errors when copying the genomic DNA sequence that later might caus...

Could USA presidential DNA trail reveal Middle-Eastern origins?

... down from father to son. Jefferson carried a very unusual Y chromosome type, which helped to strengthen the evidence in the historical paternity case. Now, new techniques have been brought to bear on Jeffersons Y chromosome, in a study reported in the American Journal of Physical Anthropology. The preside...

Scientists reveal structure of gateways to gene control

...rn is somewhat different from this norm, and these unusual sequences also are reported in the Nature paper. "We previously had a low-resolution idea that these structures all could be roughly in the same position, but now this high-resolution map makes it very clear that they really are in exactly the same ...

Ewwwww! UCLA anthropologist studies evolution's disgusting side

...e the most fertile, their disgust reactions toward unusual forms of sexual behavior during ovulation dont make sense except when considered in the context of reproductive fitness," Fessler said. "These are sexual activities that either would not result in conception or in the case of incest and sex with ol...

Blood's clotting cells harbor 'ticking time bombs,' finding may help extend blood supply

...s surprising in many ways because platelets are an unusual cell type that lacks a nucleus. We didnt know what was controlling their life span. Cell nuclei contain the genetic instructions that ultimately direct the activities of other kinds of cells. The finding has a whole list of potential implications, ...

MIT biologists solve vitamin puzzle

...alternate pathway, Walker said. One of the most unusual aspects of BluB-catalyzed synthesis is its cannibalization of a cofactor derived from another vitamin, B2. During the reaction, the B2 cofactor is split into more than two fragments, one of which becomes DMB. Normally, the B2-derived cofactor would...

Bird sex is something else

...ut apparently when it comes to birds, they have an unusual take on his and hers and the difference is genetic. Species with differentiated sex chromosomes (X and Y in humans, for example) get around the fact that males and females get different-sized portions of sex chromosome genes with a balancing act gen...

Researchers uncover protection mechanism of radiation-resistant bacterium

...diodurans has subsequently shown nothing obviously unusual in its DNA repair components, and it appears that bacteria at differing levels of resistance sustain the same amount of DNA damage from a given dose of IR. Additionally, many bacteria are killed by IR doses that actually cause very little DNA damage....

Notorious cancer gene may work by destroying messenger

...udy of a protein called PMR1, the key player in an unusual mechanism that cells use to quickly stop production of certain important proteins. Researchers discovered that PMR1 is activated or turned on by another molecule, an energy-packing protein called Src (pronounced sark). Discovered in 1977, Src...

New cell type identified in cancer development

...em-like structure. The researchers suspected these unusual cells might be precancerous stems cells and designed several tests and experiments to find out more about them. They selected three pCSC lines and injected them subcutaneously, intraperitoneally or intravenously into three groups of mice. The mice ...

Anti-fungal drug kills TB bug

...tures of the TB bacterium must mean that there are unusual aspects of its composition and biochemistry that s...DNA content in more detail, we noticed it had some unusual characteristics. In particular, we noted the presence of a very large number of enzymes called P450s...

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(Date:11/4/2014)... HOUSTON – (Nov. 4, 2014) – A majority of ... and that could have serious consequences for the rainforests ... researchers shows the positive impacts lemurs can have on ... impact their disappearance could have on the region,s rich ... rainforest have fruits eaten by lemurs. Lemurs in ...
(Date:11/3/2014)... Center study published in this month,s ... the activity of a recently discovered communication molecule of ... has been known to limit inflammation and the current ... IL-37 inhibits the ability of the immune system to ... that underlies IL-37,s effect on the immune system now ...
(Date:11/2/2014)... of Physics World , James Dacey explores the ... death" to take their innovations from the lab into ... challenge facing all start-up companies as they move from ... of two main factors: physics-based inventions are usually far ... out to be a lot more complicated than had ...
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