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Tag: "repetitive" at biology news

Drug That 'Tags' Decision-making Areas Of The Brain May Aid

...o play piano, or the process ofaddiction following repetitive exposure to specific drugs. Thesebehaviors all result from the formation of new connections betweenindividual neurons or modifications of existing connections in thebrain.“Imaging of nicotine receptors also gives us the potential to study whysome peo...

Found: Missing sequence of the human Y chromosome

...land" with eight presumably active genesflanked by repetitive satellite sequences.To ensure that this 554-kilobase sequence was in fact missing from the"finished" human genome sequence and was not a structural polymorphismpresent only in a subset of males in the human population, members ofRappold's laboratory ...

Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive

...nse, too, because other symptoms of autism include repetitive thoughts and movements, characteristics of basal ganglia function. " Surprise discovery: romance is on the right, 'attractiveness' to the left Another important discovery, Brown said, was that "to our surprise, the activation regions associated wit...

Pinpointing the cause of a neurodegenerative disorder

...e the resulting proteins to contain unusually long repetitive stretches of the amino acid glutamine. The new fi...disease, which are caused by an abnormal number of repetitive gene sequences. The discovery may also offer a new conceptual approach to understanding the patholog...

Rodent social behavior encoded in junk DNA

...r connection may emerge. Far from being junk, the repetitive DNA sequences, which are highly prone to mutate rapidly, may ultimately exert their influence through complex interactions with other genes to produce individual differences and social diversity, according to Young. ...

Complex gene interactions account for autism risk

...l interaction and communication and restricted and repetitive patterns of interest or behavior. While many previous studies have identified possible genes with links to autism, there remains no single gene with a consistent connection to the disease, Pericak-Vance said. Multiple lines of evidence, including a...

Studies on human genome variation provide insight into disease

...n chromosome 22. The deletion is mediated by rare repetitive sequences that flank genes crucial for proper deve... Genome Research how they examined these flanking repetitive sequences for patterns of polymorphisms. "Our results show that there are intervals with more frequ...

Housecat-sized Siberian tiger cubs get collared

...n chromosome 22. The deletion is mediated by rare repetitive sequences that flank genes crucial for proper deve... Genome Research how they examined these flanking repetitive sequences for patterns of polymorphisms. "Our results show that there are intervals with more frequ...

Researchers learn how blood vessel cells cope with their pressure-packed job

...ientists have gained a better understanding of how repetitive stretching of endothelial cells that line arteries... credit card to gain a better understanding of how repetitive stretching of endothelial cells that line arteries can make them healthy and resistant to vascular d...

A little telomerase isn't enough

...s within them. Chromosome ends, or telomeres, are repetitive stretches of DNA that protect chromosomes in much the same way as plastic tips on shoelaces prevent the fabric from fraying. Each time a cell divides, its chromosome ends get a little shorter, and eventually the cell can no longer divide because its ...

Discovering the first steps in transcription-coupled repair

...e. Or it may encounter situations such as a highly repetitive sequence of bases, with folding of the DNA upon itself, which make progress difficult. Unable to continue copying, RNAPII pauses and sometimes grinds to a halt. Exposure to sunlight causes decreased transcription when ultraviolet-induced DNA damage ...

Warbling whales speak a language all their own

...als." The structure of the humpback whale song is repetitive and rigid. The whales repeat unique phrases made up of short and long segments to craft a song. There are multiple layers, or scales, of repetition, denoted as periodicities. One scale is made up of six units, while a longer one consists of 180-400 u...

Utah researchers confirm chromosome may harbor autism gene

... and communication. Those with autism also display repetitive behaviors and interests. The study involved 31 members of a family of Northern European ancestry, seven of whom have autism or an autism-related disorder. The family members are part of the Utah Population Database, a computerized set of the genea...

Oops! Researchers publish new findings on the brain's response to costly mistakes

...failures in certain aspects of everyday life, with repetitive patterns of behavior to ward off or prevent such events. The new research, published in the Journal of Neuroscience, involved 12 healthy adults who had their brains scanned using a powerful functional MRI (fMRI) imaging machine, while they were ask...

Molecular mechanism may explain how fevers spark seizures

...ne could leave a neuron open to the excitation and repetitive firing that characterizes seizures. The investigators are currently studying where the receptors go when the temperature is raised -- are they taken inside the cell more quickly, are they degraded, is their forward insertion into the cell membrane sl...

Groovy protein essential for promoting cancer development

... where it extends telomeres, the regions of highly repetitive DNA found at the ends of chromosomes. In most healthy adult cells, telomerase is shut off, and telomeres slowly shrink during cell division ?a normal process that helps limit cells' lifespan. Cancer cells, however, usually find a way to turn telomera...

Report lists top 20 most-vulnerable African carnivores

... where it extends telomeres, the regions of highly repetitive DNA found at the ends of chromosomes. In most healthy adult cells, telomerase is shut off, and telomeres slowly shrink during cell division ?a normal process that helps limit cells' lifespan. Cancer cells, however, usually find a way to turn telomera...

Evolutionary scrap-heap challenge: Antifreeze fish make sense out of junk DNA

...n exception to this because it consists of a short repetitive sequence that only needs to be duplicated four times to give a fully functioning protein". ...

Pathway toward gene silencing described in plants

...n mice. One role of DNA methylation is to turn off repetitive genes, such as transposable elements that can move or spread throughout a genome and disrupt other gene functions if left unchecked. There is also interest in DNA methylation because understanding how some genes are selectively silenced and how silen...

Mutant mice show key autism traits

... mutants do not display the expression of abnormal repetitive behaviors seen in ASD, although it is unreasonable to expect perfect phenotypic overlap of human ASD with any mouse model." Also, they wrote, "as appropriately pointed out by the authors, Pten deletion is restricted to postmitotic neurons in the CNS...

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