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Tag: "surprising" at biology news

An HIV Protein Plays a Surprising Role in Gene Activation

...F-deficient TBP. Altogether, these results show a surprising new role for Tat in stimulating assembly of a transcription complex. What's more, the complex lacks the TAFs typically linked to TBP in mammalian cells. Because their experiments analyzed only transcription complex assembly, the authors are careful t...

Scientists decipher genome of fungus that can cause life-threatening infections

...ay account for the disparity invirulence.Among the surprising findings of the study were the complex genestructures discovered in C. neoformans that are unlike those found inpreviously sequenced yeasts and are reminiscent of the genomes of morecomplex organisms. The study also catalogued, for the first time on ...

Scientists rid stem cell culture of key animal cells

...to the mechanism," Xu says. Moreover, Xu made the surprising discovery that the very molecules that encourage human embryonic stem cells to differentiate appear to inhibit differentiation in mouse embryonic stem cells. Aside from feeder cells, two other sources of animal material remain in stem cell culture m...

Protein Packages Found To Activate Genes; May Be What Regulates Development And Disease

...surrounds the human genome. Their findings reveal surprising and previously unknown specifics of how genes get ...nology company. The analysis shows a striking and surprising exception in the way some critical genes are activated by the protein packaging. These proteins act ...

Placenta Is A Rich Source Of Blood Stem Cells

...ston and the Dana-Farber Cancer Institute report a surprising finding about embryonic development: the blood sys...organ for blood development,'' Orkin says. ''It is surprising that this role for the placenta has been overlooked for so many years.'' The study, published in th...

Open microfluidic and nanofluidic systems

...ation but can vary over a wide range of values. A surprising prediction of the new theory is that the experimentally observed polymorphism of the wetting liquid depends only on two parameters: (i) the channel geometry, i.e., the ratio of the channel depth to the channel width; and (ii) the interaction between ...

Researchers trace evolution to relatively simple genetic changes

...he skeletal armor of fish living in the wild. The surprising results, announced in the March 25, 2005, issue of journal Science, bring new data to long-standing debates about how evolution occurs in natural habitats. "Our motivation is to try to understand how new animal types evolve in nature," said molecula...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...he skeletal armor of fish living in the wild. The surprising results, announced in the March 25, 2005, issue of journal Science, bring new data to long-standing debates about how evolution occurs in natural habitats. "Our motivation is to try to understand how new animal types evolve in nature," said molecula...

Scientists discover unique microbe in California's largest lake

... of Chemistry and Biochemistry.Miller says another surprising discovery occurred when the scientistsstudied the DNA of the new organism. By analyzing sequence data for thesmall subunit ribosomal RNA gene, which encodes part of the cell'sprotein synthesis machinery, they demonstrated that chlorophylld-producing ...

Scientists discover that host cell lipids facilitate bacterial movement

...face of the cell membrane. "The most exciting and surprising finding is that an intracellular bacteria is able to attract host cell membrane lipids to its surface and these membrane lipids facilitate the ability of the bacterium to move within cells. This capability is unique to Listeria and is not found in an...

UF Researchers Map Bacterial Proteins That Cause Tooth Loss

...odel of the P. gingivalis proteome, resulting in a surprising find. “Some of the proteins we previously thought were important when they were expressed in the lab proved not to be when the organism is in an environment that mimics the oral cavity,?Lamont said. To put it simply, the behavior, or protein expres...

World's largest rainforest drying experiment completes first phase

...h The Woods Hole Research Center are analyzing the surprising results of the first phase of a drydown experiment occurring in the Amazonian rainforest. From January 2000 to July 2004, rainfall was excluded from a one-hectare (2.2 acre) plot in the middle of the Tapajós National Forest, in Brazil. A total of 6 ...

Scientists find fossil proof of Egypt's ancient climate

...the lifetime of the lake. Their analyses support a surprising picture of arid Egypt: 130,000 years ago, what everyone considers an eternal desert was actually a thriving savannah, complete with humans, rhinos, giraffes and other wild life. Evidence for the hominin presence abounds near the lake in the form of ...

Sequencing of marine bacterium will help study of cell communication

... activity. "Analysis of this sequence has revealed surprising parallels with Vibrio cholerae and other pathogens," said Ann Stevens, associate professor of biology at Virginia Tech. This sequence research is described in the PNAS online early edition the week of February 7, 2005, (www.pnas.org), in the article...

Mayo Clinic Researchers Create 'Obedient Virus'; First Step To Use Measles Virus Against Cancer

...he focus of this vision several years ago when the surprising finding was made that the measles strain used internationally for vaccinations has natural anticancer activity. "But we had a concern that the measles virus may be a little too promiscuous in its ability to infect both cancer cells and non-cancer ce...

Surprising findings reported about iron overload

...Islanders have high levels of iron in the blood is surprising because they also have the lowest prevalence of the particular gene mutation that is found in Caucasians with the typical form of hemochromatosis," he said. "This may mean that the Asians and Pacific Islanders have a different genetic mutation that h...

Liposome finding implies electrical effect on cell development

...nce of local electrical fields. In particular, the surprising finding of such electrically caused bionanotubule formation may reveal a previously unknown process involved in the development of structures like axons and dendrites in nerve cells. Hayes will present the results of the experiments at a 2 p.m. Marc...

Multi-purpose protein regulates new protein synthesis and immune cell development

...nd the Howard Hughes Medical Institute reveals the surprising finding that this same signaling protein is required for the formation of immune cells called B lymphocytes. "This is a unique signaling pathway," says Randal Kaufman, Ph.D., a professor of biological chemistry in the U-M Medical School and an HHMI ...

Youth With HIV Take More Risks After New Meds Introduced

...rs found. "Given the availability of HAART, it is surprising that the post-HAART youth experienced more symptoms. This suggests that although they are being identified as HIV-positive at a younger age, these youth are being identified later in the progression of the disease. Therefore, it is also likely that t...

Researchers unlock mechanism creating jigsaw puzzle-like plant cells

...lop in a jigsaw-like pattern, providing the leaf a surprising degree of strength. The findings were published in today's edition of the journal Cell. Zhenbiao Yang, a professor of plant cell biology at the UCR's Center for Plant Cell Biology and Institute for Integrative Genome Biology, worked with a team of r...

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