Tag: "stretch" at biology news

UCF researcher uncovers protein that could stop replication of cancer cells

...son said. The work focuses on the role that a long stretch of repeated DNA known as a telomere has in influencing cell length and, in turn, its lifespan. Each of the human's 46 chromosomes is capped on either end by telomeres, which help protect the cells. Each time a cell divides, the telomeres are shortene...

New tumor suppressor gene linked to cancer predisposition

...f colleagues, had long suspected that a particular stretch of DNA on chromosome 13 known as a rich source of mutations linked to various malignancies might be the location of other genes important in carcinogenesis. Multiple tests with a portion of that DNA yielded ARLTS1 as a specific new gene. ARLTS1 be...

Scientists track 'stealth' DNA elements in primate evolution

... 3-4 million years. This apparent 20-million-year stretch of retrotranspositional quiescence, followed by a sudden outburst of human-specific retrotransposition activity in the past few million years, led Dr. Batzer and colleagues to formulate a new theory for the evolution of Alu elements, termed the "stea...

Scientists find microRNAs regulate plant development

... bind to mRNA molecules containing a complementary stretch of RNA sequence. The complex then cleaves the mRNA...und plant parts). Like ARF17, NAC1 mRNA contains a stretch of sequence that is complementary to microRNAs, and thus shows potential for microRNA-mediated regul...

Type 2 diabetes may begin with Grandma's diet

...alth Science Center, explains: "These new findings stretch the unwanted consequences of poor nutrition across generations. It offers us important clues about the origins of insulin resistance and type 2 diabetes. Knowledge of the origins of type 2 diabetes has the potential to improve the health of millions ...

Scripps scientists describe protein used by bacteria and cancer cells to resist drugs

... dimer with two identical subunits. These subunits stretch across the cell membrane, coming together at the top (outside of the cell) and opening up like two outstretched arms on the inside of the cell. Significantly, the structure is trapped in what they call a "post-hydrolysis" state -- basically caught i...

New collision looks imminent for B-15A iceberg

...low broke the end off Drygalski in mid-April. The stretch of Victoria Land coast parallel to B-15A's current position is unusually rich in wildlife, noted for colonies of Adelie penguins as well as Weddell seals and Skuas. If B-15A were to remain in its current position for any prolonged length of time, the...

Elusive salamanders have role in developing new sampling models

...ntil April 21, however, none had been found over a stretch that spanned four years. Researchers noted that this was not totally unexpected because of a 100-year drought event that dried ponds and halted reproduction from 1999 through 2002. Since the first salamander was found six weeks ago, 36 more have been...

Loyola researchers discover congestive heart failure biological marker

...y. When this happens, the heart muscle wall cannot stretch as much and release BNP." Left untreated, CP can be life-threatening, and a surgical procedure to remove part of the pericardium may be necessary. With RCMP, the heart muscle stiffens so that not enough blood can enter the ventricles, the lower chamb...

University of Chicago study overturns conventional theory in evolution

... It is, in a sense, "perfect." For a pseudogene a stretch of DNA sequence that resembles a gene but has no function its Ka/Ks ratio is approximately 1.0, which means that synonymous and nonsynonymous mutations are accepted at the same rate since the gene is functionally irrelevant. For a gene that is highl...

Researchers get first peek at amyloid's spine

... co-author Melinda Balbirnie had narrowed down the stretch of prion necessary for fibrils to only seven amino acids, which were located at one end of the entire protein. Filling a test tube with just those snippets was enough to form short thin threads with the same essential characteristics of the common am...

Researchers track down cause of a disfiguring bone disorder

...a regulatory element in a missing 52,000-base-pair stretch of DNA that normally directs the SOST gene to produce a protein that maintains control of bone formation rates. Without this regulator, bone production goes up, progressively increasing bone density, or osteosclerosis. The effect primarily occurs in ...

Virginia Tech fisheries department releases cultivated mussels at Nature Conservancy site

... toxic spill that killed most aquatic life on that stretch of the river. Also released were the adults of the fluted kidney shell mussel, which is a federal candidate for the endangered list, and stocking adults of rabbitsfoot mussels, which are endangered. Why are mussels so important? Mussels are key indic...

Ancient DNA helps clarify the origins of two extinct New World horse species

...tochondria, which have their own genome, contain a stretch of sequence that's useful for inferring evolutionary relationships: though the region undergoes high mutation rates, the patterns of mutations remain stable over thousands of generations. The mtDNA analysis of the South and North American horses prov...

LSU scientists develop new theory about human genome evolution by tracking 'stealth' DNA elements

... 3-4 million years. This apparent 20-million-year stretch of general inactivity, followed by a sudden outburst of human-specific retrotransposition activity in the past few million years, led Batzer and colleagues to formulate a new theory for the evolution of Alu elements, termed the "stealth driver" model...

UF researchers test drug that could cut orthodontic treatment time in half

...as the hormone that helps women's pelvic ligaments stretch in preparation for giving birth. It does this by softening collagen and elastin in the tissues, loosening strong, cord-like fibers until they have the consistency of limp spaghetti noodles. That ability prompted researchers to consider relaxin a poss...

UK science helps farmers in Africa and India

...ingerprint on young plants to look for the certain stretch of DNA that means it has the resistance to the disease." Researchers at IGER are now looking at developing this approach for other traits of pearl millet, such as drought resistance, to assist farmers in the developing world. ...

Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy

... a transmitter on one fiber measures the amount of stretch and a force transducer on the other fiber measures...cytes from normal mice easily handled a 20 percent stretch in length, while myocytes from dystrophin-deficient or mdx mice had about 70 percent more passive te...

Gene's mutations found to cause life-threatening aortic disease

...z said. Milewicz's team continues to scrutinize a stretch of chromosome 5 to pinpoint another genetic variation that they earlier mapped to that area of the genome. Researchers elsewhere have mapped two other genetic variations affecting single families to chromosomes 11 and 16. Milewicz also is on the f...

U Iowa researchers prevent hereditary deafness in mice

...ne differed by only two nucleotides over the short stretch of gene targeted by the RNAi, the mutant human gene was silenced while the normal mouse gene was unaffected. With a view to someday moving this therapy to humans, the researchers also developed a non-invasive strategy to deliver the RNAi. A small pie...

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(Date:7/27/2014)... have survived the asteroid strike that wiped them out ... in history, scientists say. , A fresh study using ... palaeontologists to build a new narrative of the prehistoric ... found that in the few million years before a ... experiencing environmental upheaval. This included extensive volcanic activity, changing ...
(Date:7/27/2014)... potential for global climate change to cut food supplies. ... the interactions between increasing temperature and air pollution ... , A new study involving researchers at MIT shows ... policymakers need to take both warming and air pollution ... looked in detail at global production of four leading ...
(Date:7/25/2014)... SYRACUSE, N.Y., July 25, 2014 In the first broad-scale ... Forest Service scientists and collaborators calculated that trees are ... preventing 670,000 incidences of acute respiratory symptoms. , While ... improvement of less than 1 percent, the impacts of ... effects of the reduced air pollution at nearly $7 ...
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