Tag: "traced" at biology news

Brain Protein "Rescues" Neurons From Atrophy

...ns to grow, form and maintain connections might be traced to defects in neurotrophin signaling," Katz said. "These disorders might include certain forms of mental retardation such as Down's syndrome, in which brain cells have fewer dendrites." In some cases, such as certain forms of epilepsy, pathologically...

Two Long-sought Diabetes Gene Found

...rsity of Chicagos Howard Hughes Medical Institute, traced the disorder to mutations of two similar genes one on chromosome 12 and one on chromosome 20 that regulate the activity of other genes. "Both of these are known genes but neither one was considered likely to play a role in diabetes," said Bell. Both...

Scientists Trace Roots Of Protein That Keeps Antarctic Fish From Freezing

... studying antifreeze protein in Antarcticfish have traced the protein's genetic origin and historical roots. They'vealso provided an example of convergent evolution by ruling out the suspectedcommon ancestry with an antifreeze-bearing Arctic fish. Almost identical antifreeze glycoproteins are produced inde...

Single Mechanism Seen To Underlie Group Of Neurodegenerative Diseases: Mutant Proteins Form Insoluble Masses In The Nuclei Of Neurons

...sue of Cell. Each of these diseases can be traced to a different flawed gene, buteach shares a common problem in its DNA -- instructions for producing the aminoacid glutamine are repeated excessively along a given stretch of a gene codingfor an important protein. In normal proteins, the sequence of ...

Pea Plant Stem Growth Gene Cloned

...d seven distinct characteristics of pea plants and traced how those characteristics were passed through generations. One of the principal traits on which he worked was stem length, the primary determinant of plant height. The plant scientists working at the University of Tasmania, Hobart, Australia, isolat...

Gene Locus Found For Essential Tremor Disorder

...a T. Pho, and Linda E. Nee,M.S.W., report how they traced the gene to the short arm of chromosome 2 (1). "This is an important advance for a disorder that affects millions ofAmericans," says Zach W. Hall, Ph.D., Director of the National Institute ofNeurological Disorders and Stroke. "It will lead the way ...

DT104 Advice:How To Slow Salmonella Spread

..., recent cases of DT104 illness in humans havebeen traced to contaminated meat products, particularly sausage and meat paste. Although there have been no confirmed cases of DT104 food poisoning in theUnited States -- other than the unpasteurized milk in Vermont -- public healthofficials fear the disease cou...

Good Nutrition In Childhood Can Prevent Some Cancers In Later Life

...and under, which examined their dietary intake and traced these individuals through to adulthood. Overall, five per cent of the population studied, died of cancer. However ,they found that children with a lower dietary intake were less likely to suffer from some cancers in later life and that those with a ...

Mouse Gene Reveals Clues To Human Deafness

...tions of the Israelifamily. Hearing impairment was traced back five generations to an ancestor bornin 1843 in Libya. The family migrated through Tunisia and Egypt, eventuallysettling in Israel. The researchers identified 12 living family members withprogressive hearing loss, and 11 unaffected relatives olde...

Smog Spreading To South Pacific

...ected significant ozone concentrations that can be traced back tobiomass burnings on distant continents, indicating that the smog created by theburning is long-lasting and migrates great distances. In 1996, for example, two research planes flying in the South Pacificencountered ozone from biomass b...

Scientists Seek Early Warning Of Drinking Water Threats

...y. A class of viruses calledcaliciviruses has been traced to recent waterborne outbreaks in the UnitedStates. The bacterium Escherichia coli 0157:H7, has caused at least twowaterborne outbreaks that affected more than 300 people. In North and SouthAmerica, the parasite Cyclospora has caused serious health p...

Aspirin's Preventive Action In Heart Attacks Tied To Genetics

...ects some people from developing heart attackshave traced the mechanism back to a specific genetic factor present on thesurface of clotting cells called platelets. The discovery could be used to determine which people at risk for heart attacksand heart disease might benefit mostly from daily doses ofaspirin...

New Model Makes It Possible To Predict Emergence Of Antiviral Drug Resistance

...ce developing." The UCSF mathematical model, which traced the dynamics of drug-sensitive anddrug-resistant herpes simplex virus in the general population, was designed topredict how much drug resistance could be expected to emerge over the next 50years if treatment rates increased, and to identify the key f...

Discovery Of Plant-Like Metabolic Pathway In Common Parasites Supplies New Targets For Therapy

...patients. A recent Cryptosporidiosis outbreak was traced to the Milwaukee water system. <AHREF="http://martin.parasitology.mcgill.ca/jimspage/biol/EIMERIA.HTM"> Eimeria : a serious problem in poultry, causing losses on the order of $80million per year. About six years ago, researchers discovered...

Priestly Gene Shared By Widely Dispersed Jews

...s because theY-chromosome of any individual can be traced back even over many generations toonly one male ancestor. This is not the case for other chromosomes, each ofwhich carries representation from many different ancestors on both the maternaland paternal lineages. Accordingly, since the Jewish priesthoo...

Alstrom Syndrome Genetics Studied At Jackson Laboratory

...hought to have died from Alström Syndrome. She traced thedisease back 13 generations in this "kindred", connecting a common ancestor in1650 to five living children with Alström Syndrome. The children, from fournuclear families, range in age from 8 to 14. Because of the common ancestor, the r...

Gene Discovery Provides Insights Into Epilepsy

...and Wayne N. Frankel of The Jackson Laboratoryhave traced the seizures to a mutation in a gene called Cacng2, whichcodes for part of the "gate" that controls the flow of calcium into brain cells.Calcium is critical to regulating the release of neurotransmitters, thechemicals that brain cells use to commun...

14,000 Years Of Atmospheric Lead Emissions Recorded In Swiss Peat Bog As Published In Science Magazine

...r in the 11 September issue of Science,researchers traced natural variations in atmospheric lead and dust associatedwith the retreat of the large ice sheets from Scandinavia. While peat bogs and ice cores have been used to analyze atmospheric leadlevels for small increments of time and back to sever...

Genetically Speaking, Race Doesn't Exist In Humans

...o individual variation. A mere 15 percentcould be traced to what could be interpreted as "racial" differences. "The 15 percent is well below the threshold that is used to recognize race inother species," Templeton says. "In many other large mammalian species, we seerates of differentiation two or three ti...

Monkeys Have Numerical Abilities, Two Columbia Psychologists Report

... intelligence, like other human attributes, can be traced to animalorigins. "We have ample evidence that animals can think without language," saidProf. Terrace, who heads Columbia's Primate Cognition Laboratory. "In ourcurrent and previous research, we have shown that animals solved complexproblems...

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