Single cell type seems to control internal clock and pupil of eye
...Hattar. "When and how much a mouse runs on a wheel reveals whether the animal thinks it is day or night. If melanopsin is required for resetting the internal clock, however, mice without it shouldn't be able to adjust to cycles of light and dark."...SFVAMC study explains prostate cancer resistance to hormone therapy
...issue of Journal of the National Cancer Institute, reveals that late-stage prostate cancer is unresponsive to hormone therapy because the cells have shut down genes for the estrogen receptors where the drugs act. The genes are switched off by a process called hypermethylation, a well-known process in which n...Scientists reveal fine detail of cell's energy machinery
...f the pump, a key enzyme in bacterial respiration, reveals for the first time one of the molecular mechanisms that underpins cellular respiration, and confirms a Nobel Prize-winning theory proposed over 40 years ago by Briton Peter Mitchell. Professor So Iwata and colleagues from the Laboratory of Membrane ...Scientists solve first flavivirus structure
...me. Kuhn says the three-dimensional reconstruction reveals several unexpected features in the dengue virus architecture. "The organization of the shell protein is very different from what we've seen before and what we might have predicted for this type of virus," he says. "For example, the protein completely...Researchers describe overall water balance in subglacial Lake Vostok
...upported by the National Science Foundation (NSF), reveals that although the lakeis perhaps millions of years old, its waters are relatively young. Bell's paper demonstrates that over a period of 13,300 years, all of the water was removed by the overlying ice sheetand replaced from other sources. The lake ...Scientists reveal secrets of infectious childhood heart disease
...re unique to those bacteria. Their discovery also reveals that two rheumatic fever outbreaks occurring 12 ye...ny S. Fauci, M.D., NIAID director. "This research reveals some of the secrets of group A Strep and is a major accomplishment in our quest to understand an imp...Epstein-Barr virus mechanism for long-term survival discovered
...ociated cancers, a study from The Wistar Institute reveals the unexpected mechanism for how EBV survives inside its host for so long. Once settled in the host cell nucleus, the EBV genome uses a system of cellular proteins similar to the proteins at the ends of human chromosomes called telomeres, the resear...Brookhaven Spotlights: News from the National Synchrotron Light Source
...tein called edema factor (EF). The structure of EF reveals the first steps of the process by which this protein inhibits the immune response of a person who has inhaled anthrax: EF binds to a protein called calmodulin which is abundant in the host cell prompting EF to produce chemicals that inhibit the imm...April GEOLOGY and GSA TODAY media highlights
... USA. Pages 379-381 Examination of published data reveals that a marine bed in Beijing can be dated as 80 Ka or younger on the basis of abundant nannofossils. This age is ~30 times younger than that published previously on the basis of magnetostratigraphic and biostratigraphic interpretations. The abundant ...Unique social system found in famous Tsavo lions
... peer-reviewed study of the ecology of Tsavo lions reveals that they have a unique social system. Tsavo lions are the only lions known to live in large groups of females ruled by a single male. The scientists surveyed the lion population of Tsavo East National Park in eastern Kenya, documenting the size and ...New process speeds protein separation
... maps, subtracts out parts that are identical, and reveals the remaining differences. The ProteoSepTM process and ProteoVueTM software also make it possible to see how the protein profiles of drug-treated cells change over time or with various drug dosages. "We've also been looking at cancer progression," L...Extensive research survey confirms life on Earth now being affected by global warming
...ly how the climate will change there." The study reveals that sudden climate events that have an extreme lo...," Post says. "Nevertheless, this complex picture reveals that we need to study each location and each species and each set of local population dynamics indiv...Strange signals from breastfeeding
...nger and shorter ones got shorter. The new study reveals a more subtle effect. While the women smelling the breastfeeding compounds did not report increased sexual activity-this behaviour was most obviously influenced by the absence or presence of a partner-they did report significantly heightened and more...Researchers identify cell, genetic environment behind nerve-tissue tumors that lead to cancer
... research, published in todays edition of Science, reveals that tumors in neurofibromatosis 1 (NF-1) patients form out of a particular type of cell, the Schwann cell. Neurofibromatosis, also known as von Recklinghausen disease, is a genetic disorder that causes benign tumors to form on the nerves, skin and i...Turning off building lights reduces bird window-kill by 83%
CHICAGONew data never before published reveals that turning off building lights in a major city could save thousands of migratory birds a day. For the first time, we now have numbers to back up scientists claims that turning off building lights during migration season is an effective way to reduc...The pathway to anxiety begins early in life
...search, published in the March 28 issue of Nature, reveals there is a window of time during the development of the mouse--between five and 21 days after birth--when the brain becomes wired to be anxious later in life. The comparable time in humans is the third trimester of pregnancy and the first two to thre...Protein simulation can be done three times as fast
...billionth of a second. The research from Groningen reveals that steps of 7 femtoseconds are also good enough. With this the simulation is three times as fast. A number of research groups are already using the results from the Groningen study. Steps of 7 femtseconds ignore the forces which occur between hydro...Penn State College of Medicine researchers correct scientific theory about how gene switch works
... therefore, normal gene expression. This discovery reveals that a protein previously thought to be in the nucleus of the cell actually resides in the cytoplasm, the part of the cell that surrounds and interacts with the nucleus. Also, the study corrects a theory held since 1992 that describes the way the gen...Transmission of drug-resistant HIV on the rise
...genetic sequence of the virus. This genotypic test reveals genetic mutations that cause drug resistance. Most alarming was the increase in transmission of virus resistant to non-nucleoside reverse transcriptase inhibitors (nnRTIs). The nnRTIs are one of three major classes of anti-HIV drugs and are an import......t the prevalence of the disorder. This information reveals that mutations in the MECP2 gene can take a wide variety of forms. "We now know of cases of classic autism and schizophrenia that are caused by mutations in this gene," said Zoghbi. "The clinical spectrum is so broad that we don't know the true pr...