Scientists offer new view of photosynthesis
...Institute, has come up with a new insight into the mechanism of photosynthesis, which involves the orchestrated...s colleagues tried to uncover more of the physical mechanism driving photosynthesis by creating mutants that would theoretically tweak the electron transfer rela...... Biology Laboratory (EMBL) have now worked out the mechanism underlying asymmetric cell division in nematode wo...likely that different species might also share the mechanism of the process....Scientists discover rare 'gene-for-gene' interaction that helps bacteria kill their host
... to humans and can be used as a biological control mechanism to replace pesticide use. The researchers, from the universities of Bath, Bristol and Exeter, all in the UK, used the large caterpillar Manduca sexta (tobacco hornworm) to study the bacteria's so-called virulence genes. "The beauty of this resea...'Insulator' helps silence genes in dormant herpes virus
...ains active. Scientists have long puzzled over the mechanism used to keep this small region of the genome going...t The Wistar Institute have discovered a molecular mechanism that keeps HSV-1 activation restricted to a single gene for months or even years. The researchers ha...Drought limits tropical plant distributions, scientists at the Smithsonian report
...tributions at both local and regional scales. This mechanism to explain a common observation will contribute significantly to models of land use and climate change. Tropical forest, often called rainforest, conjures up images of verdant, evergreen landscapes. Whereas temperatures may be relatively constant in...pHLIP, a novel technology to locate and treat tumors
...dic as a result of the way they grow. Since the mechanism is general, and since even very small tumors can be targeted, there is an exciting array of possible applications for pHLIP, said Donald Engelman , Eugene Higgins Professor of Molecular Biophysics & Biochemistry at Yale and a co-author of the pape...Estrogen fluctuation affects epileptic seizures
...egulate the expression of genes, a relatively slow mechanism to change brain function. Her group found that these receptors also are located on vesicles at inhibitory synapses and that estrogen mobilizes these vesicles toward synapses. The synaptic location of estrogen receptors shows that the effects of this ...Plants with male and bisexual flowers on the same plant are better mothers
...also female reproductive success. So what is the mechanism through which male flowers increase female reproductive success? Such a benefit may arise if resources saved by producing smaller male flowers are reallocated to increased seed production, if male flowers are more attractive to pollinators, or if mal...Enhanced environment restores memory in mice with neurodegeneration
...olleagues also sought to understand the biological mechanism by which environmental enrichment enhanced learnin... known for half a century, nobody really knows the mechanism behind it," said Tsai. "However, there has also been a growing body of evidence that chromatin remod...Fat tissue-derived hormone leptin increases e-cadherin expression, obesity-breast cancer link noted
...nding, says Dr. Sebastiano Ando, establishes a new mechanism for the link between obesity and breast cancer and suggests new targets for drugs that could intervene in that mechanism. Dr. Ando's presentation on Sunday, April 29 is part of the scientific program of the American Society of Investigative Patholo...Adult stem/progenitor cells repair of damaged brain, pancreas, kidney cells newly understood
...y, are shedding light on the previously mysterious mechanism through which even relatively small amounts of stem/progenitor cells taken from a patients own bone marrow enhance repair of damaged tissues. The cells not only differentiate to replace injured cells, as had been understood, but they also stimula...Linking DNA and histone methylation
...r Center) and colleagues lend new insight into the mechanism of epigenetic silencing of euchromatic genes. Dr. Carey emphasizes that "The study provides a new direction to understand how histone and DNA methylation, two phenomena that play a significant role in stem cell differentiation and cancer, can comm...News tips from the Journal of Biological Chemistry
...ew viruses, which spread to neighboring cells. The mechanism by which HIVs DNA enters the nucleus is not yet fully understood and may offer new ways to fight HIV. Xiaojian Yao and colleagues studied how various cellular proteins help the virus enter the infected cells nucleus. They revealed new roles for the...Tracking genes for self-pollination in arabidopsis
... other plants can self-pollinate, a handy survival mechanism for a lonely plant. The ability to self-pollinate turns up in cultivated tomatoes and canola, among other important crops, and sometimes it can be a nuisance for plant breeders and seed producers who want to develop highly desirable hybrid varieties ...Scientists identify key to integrating transplanted nerve cells into injured tissue
...e of Harvard Medical School, have identified a key mechanism for successfully transplanting tissue into the adult central nervous system. The study found that a molecule known as MMP-2 (which is induced by stem cells) has the ability to break down barriers on the outer surface of a damaged retina and allow hea...Story tips from the Department of Energy's Oak Ridge National Laboratory, April 2007
...rates of stream flow from forested watersheds. The mechanism for these effects, which has been implicated by several studies, is reduced capacity of the plants to regulate water loss through stomata, the breathing pores in leaves. Researchers cautioned, however, that they need to test these concepts further wi...Mosquito genes explain response to climate change
...t parts of the genome we must look to identify the mechanism of photoperiodism," Bradshaw said.Collaborative studies already are underway to determine the same genes in stickleback fish at the UO and in fruit flies at the University of Pennsylvania. "The response to climate warming in animal populations has ...Everything starts with recognition
...of only two individual molecules to show the basic mechanism underlying recognition of dipeptides. By means of ...archers have shown for the first time this dynamic mechanism of how two molecules "shake hands" and recognise each other by mutually induced conformational chang...Antioxidant found in many foods and red wine is potent and selective killer of leukemia cells
... cell lines. When the investigators studied the mechanism of cell death in the leukemia cells, they found that C-3-R induced the accumulation of peroxides, a highly reactive form of oxygen, which, in turn, activated a mitochondria-mediated apoptotic pathway. Mitochondria are specialized structures located w......for Biological Studies discovered a novel two-step mechanism that ensures that all cilia beat in unison. Thei...s known about the structural details of cilia, the mechanism through which ciliated epithelia coordinate the direction of their strokes remained unknown. But bef...