Northwestern team identifies first enzyme in mammalian circadian clock
...au in a strain of Syrian hamsters. The researchers bred a normal strain of hamsters with the tau hamsters, and then tested the offspring's circadian behavior. The animals broke down in to three groups. Normal hamsters had a 24-hour sleep-wake cycle; hamsters with one mutant tau gene (heterozygous) had a 2......County. Over the nine years of the study, 434 jays bred on 55 territories and had 527 young that fledged. The researchers found that 15% more breeding adult jays died on roadside territories than on non-road territories (38% versus 23% per year). Moreover, on roadsides the number of adults that died was ...Bitter taste receptors identified
...useful in studying taste because strains have been bred with the inborn ability to taste or not taste certain bitter substances. Studies of these mice have pinpointed a cluster of gene positions on mouse chromosome six that are associated with the tasting of a number of bitter substances. When Zuker's and...Bacterial strain may help clean up harmful industrial waste
...ike the activity seen when the bacterial strain is bred on toluene. Even if Coschigano determines how to control T1's appetite for toluene in the lab, he doesn't know how efficiently the bacterial strain will clean up contaminants in the complex natural environment. A more predictable, easier and cheaper...Scientists link gene to uterine dysfunction
...sential for proper cell division. When scientists bred mutant mice that lack CENP-B, however, the mice appeared surprisingly normal. To take a closer look, Choo and colleagues have now mutated the protein in three genetically distinct mouse strains and examined the effect across all strains. The mice a...Researcher finds alternatives to antibiotics for growing chickens
... by selecting for animals that grow rapidly, we've bred animals with weakened immune systems," he says. "Animals that respond strongly to diseases, vaccinations and other immune system stimulants eat less and lose muscle mass. Breeders can't now select for birds with strong immune systems because that mea...Genetic variation in sensitivity to estrogen may mask endocrine disruption
...cial outbred lines of laboratory animals have been bred forlarge litter size and vigor," Spearow explained. "As a result, the males from these strains tend to have largertestes anda decreased sensitivity to the estrogen-triggered mechanism that temporarily 'turns off' the reproductive system."...Genetic resistance to chemically-induced diabetes in mice linked to elevated antioxidant levels
Research at The Jackson Laboratory comparing mice bred forresistance or susceptibility to chemically-induced insulin-dependent (Type 1)diabetes suggests that the major difference is in the genetic control ofantioxidant enzymes. These enzymes help protect against pancreatic beta-celldestruction caused by ...August 5, 1999 — Researchers who had bred a group of mice inhopes of learning more about a brain hormone that stimulates appetite got a bitof a surprise when they saw that the rodents would suddenly collapse and fallfast asleep with no provocation. As a result, Howard Hughes Medical Institut...A first: Endangered puaiohi birds fledge four chicks in the wild
...ne benefit has been that some of the captive- bred birds are interbreeding with wild birds as well as each other. USGS researchers who have been monitoring the birds say the released puaioho are showing some surprising characteristics. "The exciting news has been the propens...Study points to possible gene therapy cure for hemophilia
...d factor VIII "knockout mice," astrain genetically bred without the gene for the clotting protein. "Although the [blood] levels of factor VIII are not at 100 percnet usingAAV gene transfer, they would be clinically beneficial to patients withhemophilia A," Walsh says. He notes that people with se...Purdue Scientist Wants To Find Out What Went Sour With Flowers
...ticulture and Landscape Architecture. "Flowers are bred for color, size andshelf life without any attention to scent. Floral scent disappeared, and nobodyknows why." Dudareva is one of the few scientists in the world who is working to answerthat question, and a few others, about this most appreciated ...Researchers Discover Mechanism Of Cleft Palate Development
...s (MMPs). Using "genetic knock-out" mice specially bred without the EGFR, the researcherslearned that after activation of the EGFR, MMPs regulate the closure of thepalate. Palate closure must be closely coordinated with the development of thelower jaw, a process regulated by MMPs. Simply put, if EGFR do...Deaths of Zoo Elephants Explained -- New Virus Identified
...life-saving, headded. Asian elephants are bred more frequently in captivity than their Africancousins, and a sufficient number of young elephants is necessary for bolsteringthe population, which is dwindling in the wild. Of 34 Asian elephants born in zoos in the United States and Canada f...Successful Hemophilia B Gene Therapy In Dogs May Justify Human Experiments
...emophilia naturally just as humans do and havebeen bred for a half century at UNC-CH's Frances Owen Blood Research Laboratory,showed a dose response, Nichols said. That is, the more corrected gene theyreceived, the more strongly their bodies responded. They tolerated the treatmentand replacement therapy w...Brain Building May Depend On DNA Cutting And Pasting
...o arrive at their findings, Alt and his colleagues bred mice lackinggenes for the two paste proteins, XRCC4 and ligase IV. In addition to severeimmunological deficiencies, both strains of mice displayed holes in regions oftheir brains, signifying areas of cell death. Overall, the defects were soserious th...Professor Authors Complete Guide To Fungi
...th of 100,000 turkeys inEngland. The birds, being bred for the dinner table, had been fed peanut mealinfested with a common storage mold, "Aspergillus flavus". Pathologistsdetermined that "A. flavus" produced "aflatoxin," which is one of the mostpotent carcinogens known. "Magical Mushrooms, Mischievous ...Molecular Mechanism For Evolution Described
...lation,the progeny had odd-shaped wings. When they bred the flies with anotherstock population, some of the offspring had bristles and leg-like structuresfor antennae. "This suggests that there are population-specific hiddengenetic oddities," explains Lindquist. After several rounds of inbreeding, as many...... In the study, the researchers found that mice bred without D2 dopaminereceptors voluntarily drank about half as much alcohol as did their normallittermates when they were given a choice of alcohol or tap water. "The alteredmice actually show an aversion for alcohol, whereas their normal littermatess...Four More Lemurs To Be Released Into Madagascar Jungle This Fall
... had timeto mix with the wild lemurs, and Praesepe bred with her brother Zuben'ubi. The scientists are still exploring the factors that would encourage thereleased animals to mix with the precariously small wild population, currentlynumbering about 30. "While there is movement between groups over...