Tag: "flies" at biology news

University of Alberta researcher looks for clues to mysterious disease

...r signs of locomotor defects in mutant and control flies and found the average climbing ability to be lower for the mutant males. Aside from locomotor defects, the mutants recapitulated major symptoms of the disease, A-T, including sensitivity to ionizing radiation and chromosome instability. "If yo...

Essential smell gene may provide key to new insect repellents

...ty to detect odors depends on a single gene. Fruit flies lacking the gene, known as Or83b, cannot smell. B...smell is very direct. In order for humans or fruit flies to smell bananas, for example, molecules from the fruit must waft through the air to specialized ner...

Analysis of biological clock may lead to greater understanding of human disease

...putational models of the circadian rhythm of fruit flies show that the internal clock is robust, that is, n...nformation from the scientific literature on fruit flies and perform computations to derive their findings. They made systematic changes to the mathematical ...

Circadian clock genes reign in duration of fruit fly copulation

... Beaver and Dr. Jaga Giebultowicz, found that male flies lacking one of two circadian clock genes, "period"... The effect is sex-specific, because mutant female flies copulating with normal males did not show a similar change in behavior. Both the period and timeles...

Length of sex act in flies dictated by genetics

CORVALLIS New research on fruit flies has revealed that genes which are part of the anim...he clock genes "period" and "timeless" caused male flies to copulate significantly longer than usual. This shows that clock genes affect not only behaviors o...

Got the time?

... of the method in wild type and Clock-mutant fruit flies gave similar results to those in the mouse studies. The development by Ueda and colleagues of a universally-applicable, specific, sensitive and accurate method capable of both detecting individual body time and of diagnosing circadian disorders repr...

Study suggests humans can speed evolution

...rowing list of cases, including introduced salmon, flies and plants, where human disturbance has set the stage for contemporary evolution on scales we've not witnessed before." The fish have evolved into two genetically distinct and differently colored populations, one on the north side of the island, the ...

The beak of the squid

...r biomedical research. In organisms from fungi and flies to plants and mammals, RNAi plays a multifaceted role in molecular biology by silencing genes through chromatin remodeling, interfering with protein synthesis, and--in its best-studied mode of action--quashing gene expression by cleaving messenger RN...

Casanova or caveman: Scientists isolate nerve cells that choreograph male fly's courtship behavior

...tes sexual behavior in a variety of species - from flies to reptiles to humans, according to the researcher... "In normal courtship, to anthropomorphize it, the flies are polite," he said. "Normal males show what we refer to as 'deference' - once one male starts cour...

Molecular motor shuttles key protein in response to light

...ist in humans." The light-detecting cells in fruit flies are similar to the rod and cone cells found in the...ght play a role in transporting arrestin. Studying flies that had been engineered to lack a myosin, dubbed NINAC for "neither inactivation nor afterpotential...

New genetic mechanism for evolution

...in those with normal chromosomes. It is known that flies with this inversion are larger and develop over a longer period of time than the flies without the inversion. It could be, even though it is not yet proved, that these differences are cau...

Genetic model for devastating form of paraplegia suggests new treatments

...nd a human neuron, Trotta says. For example, fruit flies have a protein called D-Spastin that performs the ...iving neurons, the researchers designed transgenic flies with altered amounts of D-Spastin protein in their neurons and analyzed the effects. Animals with lo...

Cell death protein has surprising role in cell migration

...ed in the July 8 issue of Cell. By studying fruit flies engineered to make extra use of random genes, the ...genes, look for a specific effect in the resulting flies and then figure out which gene was affected. In Geisbrecht's experiments, a small number of cells i...

A genetic model for hereditary spastic paraplegia (HSP) disease

...iving neurons, the researchers designed transgenic flies that possess altered amounts of spastin protein in their neurons and assessed the effects. Using this approach, they found that spastin protein localizes to synapses, specialized sites of neuronal communication, where it acts to locally destabilize ...

Secret behind hard exoskeletons, spreading wings revealed

... at Cornell, John Ewer, then made transgenic fruit flies by using a "death gene" that targeted CCAP cells. ...he University of Washington looked at mutant fruit flies whose outer shells showed defects or did not harden completely. She found that all of the mutants ha...

RICE gets $1.1m from DOD to study neurofibromatosis

...rt, and Stern's previous work has shown that fruit flies lacking the NF1 gene or any of five additional gen...ushover -- which draws its name from the fact that flies without the gene are easy to knock over -- creates a growth-regulating protein called Push. Stern's ...

Gene alteration points to longevity, thinness

...fruit fly, doesn't come from zero activity. Rather flies live the longest with about half the normal gene activity. Dr. Fei wants to find the optimal degree of activity. He and his co-investigator, Dr. Ganapathy, already are working on a knockout mouse that has half the normal Indy activity so they can lo...

A fly's taste experience is much like our own

...Kristin Scott and her colleagues showed that fruit flies have receptors devoted to sweet and bitter tastes ...eptors are limited to the tongue, the receptors in flies are mounted on bristles scattered all over the body, including the legs, the wings, the food-sucking...

To understand innate immunity, silence the genome

...rved genes (over 7,000) to study the effect on the flies ability to mount an immune response. Their findings, published on-line in the open-access journal PLoS Biology, not only add to our understanding of the highly conserved innate immune system, but they have also demonstrated that a global genome sile...

Flies may taste bitter better, first map of insect 'tongue' reveals

...havior of the resulting mutant flies. For example, flies that lacked taste cells containing the trehalose receptor would largely ignore food containing the trehalose sugar that they would otherwise feast on. The seven previously undescribed Gr proteins were found to trigger an avoidance response to caffein...

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