Tag: "previously" at biology news
St. Jude study solves mystery of mammalian ears
...n in non-mammals. Zuo’s team took advantage of a previously
discovered mutated form of prestin that does not make the outer hair cells contract in response to incoming sound waves as normal prestin does. Instead, the mutated form of prestin makes the cell extend itself when it vibrates. The St. Jude researc...
Cellular message movement captured on video
...w.” Chien, Hu, and their colleagues at UCSD had previously
reported that paxillin can be rapidly assembled and disassembled, and they hypothesize that this process enables cell migration by assembling new focal adhesion sites in the direction of cell movement and disassembling them on the trailing side of th...
Innovative smallpox vaccine research study to be conducted at Case Medical Center
...s must be in general good health and must not have previously
been vaccinated against smallpox. Smallpox is a contagious and sometimes fatal infectious disease characterized by raised bumps that appear on the face and body of an infected person. There is no specific treatment for smallpox disease, and the on...
Cigarette smoke alters DNA in sperm, genetic damage could pass to offspring
... of an average human smoker, according to research previously
published by one of the study's co-authors. Yauk and her colleagues found that the rate of Ms6-hm mutations in the smoking mice were 1.4 times higher than that of non-smoking mice at six weeks, and 1.7 times that of non-smoking mice at 12 weeks. “...
Largest synthetic gene ever built offers insights into anti-malarial drug resistance
...ts proper sequence, from this synthetic gene. They previously
used this same technique to create and express a synthetic version of the much smaller PfCRT gene. PfMDR1 is made up of about 4,000 base pairs and its protein is particularly large, Roepe said, making the recent work much more challenging. Alread...
Pesticides choke pathway for nature to produce nitrogen for crops
...btained by untreated crops. We feel that this is a previously
unforeseen factor contributing to declining crop yields." The researchers say that field-wide experiments now are needed, in addition to tests to determine the exact elements of pesticides that inhibit natural plant-bacteria interaction. ...
Caribbean frogs started with a single, ancient voyage on a raft from South America
...id. __IMAGE_3 The anatomy of Caribbean frogs previously
had led the advocates of both theories to conclude that species in Cuba and other western-Caribbean islands were related to different mainland species than were the species on Puerto Rico and other eastern-Caribbean islands, regardless of how they go...
Study shows big power of small RNAs, not just proteins, in halting cancer
... in the latest stages of cancer, reactivation of a previously
damaged p53 pathway caused cancer tumors to stop growing and even eliminate themselves by activating an immune response in surrounding healthy cells. Most suspected that proteins would be revealed as key to the power of p53, but this latest research...
Undergraduate research shows leaderless honeybee organizing
... went beyond the textbooks and uncovered something previously
unknown. Pierce’s discovery has to do with detecting a significant new detail concerning the behavior of the European honeybee – perhaps the most studied and economically important insect on Earth. Beyond agriculture, the finding may also have key i...
Newly discovered antibody may be body's natural defense against Alzheimer's
...s predicted by animal studies, but they were never previously
demonstrated to be present in substantial quantiti...G is made from the blood of healthy donors and was previously
reported to contain small quantities of antibodies against beta amyloid. "The effects of IVIG in...
ASU research shows connection between testosterone, dietary antioxidants and bird coloration
...dy shows that testosterone may not be as costly as previously
thought, so long as animals can nutritionally offset the immune detriments of testosterone. They may even experience a net health benefit as a result,” explained McGraw, who studies the functions of naturally occurring chemicals in birds and their re...
CT scan reveals ancient long-necked gliding reptile
...ibs are clearly visible The fossilized bones of a previously
unknown, 220 million-year-old long-necked, gliding reptile may remain forever embedded in stone, but thanks to an industrial-size CT scanner at Penn State's Center for Quantitative Imaging, the bone structure and behavior of these small creatures are...
Nurtured chimps rake it in
... chimpanzees failed both tests, as demonstrated in previously
published work (2). According to Dr. Sarah Boysen, who led the study, “We think our findings mean that the conditions under which chimpanzees are raised, housed, and maintained have long-term effects on their cognitive development, and offer direc...
New findings challenge established views on human genome
...CODE work include: Identification of numerous previously
unrecognized start sites for DNA transcription. Evidence that, contrary to traditional views, regulatory sequences are just as likely to be located downstream of a transcription start site on a DNA strand as upstream. Identification of specif...
454 sequencing identifies HIV drug resistance at early stage
...the company’s Genome Sequencer™ system to identify previously
undetectable rare drug resistant HIV variants in s... resistance mutations is at least twice as high as previously
thought. Most low level mutations are undetectable by current resistance testing methods that are us...
Exploring the dark matter of the genome
...o 254 protein-coding genes in the heterochromatin, previously
thought to contain a mere 30 to 40 (the fly's tota...in the heterochromatin, more than twice as many as previously
described. Finally, the annotators calculated the kind and distribution of repeating elements. "...
Research finds that circadian rhythms dominate all life functions
...sm as opposed to special function of some genes as previously
believed. Knowing about oscillation properties of...er algorithms. Most of these genes have never been previously
reported as changing their expression level in a daily cycle. Some of these genes, considered "house...
Human genetic 'deserts' are teeming with significant life
...ce, France: Many of the areas of the human genome previously
thought to be deserts are in fact teeming with lif...studied utilised often in a tissue-specific manner previously
unknown set of exons [the regions of DNA within a gene that are transcribed to messenger RNA] outsid...
Turn-ons and turn-offs for neurons
...ific activators which facilitate “un-silencing” of previously
silenced genes. These findings have important implications in experimental research that makes use of reversible gene expression tools to switch genes on and off. Neuroscientists need such gene switches to investigate the cause-and-effect relationshi...
Male circumcision overstated as prevention tool against AIDS
...nt as a deterrent to the global AIDS pandemic than previously
thought. The author, John R. Talbott, has conducte...appear to contribute to hi gher AIDS prevalence as previously
speculated. In a frequently cited academic paper, Daniel Halperin, an H.I.V. specialist at the Harva...
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