Tag: "membranes" at biology news

Genome sequencing sheds light on bacterium harmful to newborns

... what allows U. urealyticum to invade intact fetal membranes and infect the placenta and amniotic fluid, she notes. Scientists also want to understand the genetic and molecular mechanisms behind U. urealyticum's propensity to cause disease. Preliminary analyses of its genome did not find certain disease-causi...

Gene alterations for cystic fibrosis may also account for chronic sinus problems in some

...stent and often painful inflammation of the mucous membranes in the sinus cavities around the nose and eyes and... copies of an altered CFTR gene, which affects the membranes in the lungs and leads to accumulation of thick, sticky mucous that is not only difficult to clear, ...

Scientists spot way around cystic fibrosis cells' poor performance, way to improve drug testing

...rotein called CAP 70 lies adjacent to CFTR in cell membranes and binds to CFTR as well. Moreover, when CAP 70,...mple, has been a painstaking method isolating cell membranes and making measurements of minuscule changes in current. "But now that we know that dimers --the do...

Deadly for bacteria, great for consumers

...is exchange may take away electrons needed by cell membranes for metabolism and survival. "We think the main indicator of the effectiveness of the solution is the oxidation-reduction potential," says Hung. "When you compare chlorinated water with electrolyzed water, there is a difference in the oxidation-r...

Measuring alcohol levels in breath, blood and now the brain

...for example, have proposed that alcohol adheres to membranes differently in heavy drinkers who have developed alcohol tolerance. This is important because alcohol tolerance is thought to predispose people to develop alcohol problems or become alcoholics. Future studies in this area will characterize the biop...

'Gatekeeper' protein is key to cellular life; links bacteria, chloroplasts and mitochondria

...ngly ordinary protein called YidC found within the membranes of bacteria serves as a gatekeeper of sorts, allow...ransported, or inserted, either across or into the membranes of organelles within the cell to do their work," Dalbey said. These membranes function as barriers, ...

Scientists map first structure in important family of proteins

... a light receptor protein that resides inside cell membranes of retinal rod cells that carry out the first step in vision. It converts an environmental signal -- light -- into a biological action -- a nerve signal to the brain. The process is called phototransduction. But GPCRs do more than this. They are one ...

Life from the skies

...ut the origin of life, such as how cells got their membranes and how simple organic molecules became concentrated enough to join together to form large, complex ones. The theory arose when Adrian Tuck of the National Oceanic and Atmospheric Administration in Boulder, Colorado, noticed the work of Daniel Murph...

Antimalarial drug may point way to new class of antibiotics

... compounds interfere with the surface membranes of the bacteria, making them more permeable to the gentamicin, which ordinarily don't penetrate the bacterial cell wall very well. The mefloquine compounds enable the gentamicin to enter th...

NSF-funded researchers discover evidence of microscopic life at the South Pole

..., the snow bacteria may possess unique enzymes and membranes able to cope with a subzero existence. The team was careful to take samples at the edge of the clean-air sector at Amundsen-Scott South Pole Station to prevent contamination of the samples by bacteria from human habitation. The containers of bacte...

Carbon diem: Grants awarded to research that seizes excess carbon dioxide

...L carbon sequestration projects include developing membranes for filtering carbon dioxide from methane and gas ...such as natural gas. According to Peterson, using membranes for separating small molecules from each other, such as in industrial exhaust gas, is more difficult...

Northwestern researchers clone gene responsible for inner ear motor

...hybrid structures using this protein in artificial membranes that are part of Nano Electro-Mechanical Systems (NEMS), for instance biological pumps that might be used for drug delivery." Dallos and Madison, however, probably will leave the nanotechnology applications to other researchers. With the Prestin ...

Understanding how the first cells emerged

...ens to M2 molecules when they interact with simple membranes made of a mixture of organic substances such as carboxylic acids. Such membranes can spontaneously form vesicles reminiscent of cells (New Scientist, 12 September 1998, p 30). The ...

Test provides accurate, noninvasive method to determine fetal lung development, UF researchers find

...ESVILLE, Fla. -- When the protective, balloon-like membranes surrounding the fetus rupture weeks before the off...re complicated by preterm premature rupture of the membranes each year. Such ruptures, which at times appear to be triggered by infection, are linked to at leas...

Some carotenoids specifically target colon cancer

...dical species, as well as their reaction with cell membranes which are susceptible to carcinogenesis in the colon....

Increased production of antibiotics in space reported by University of Colorado researchers

...bound crystals, most of which adhered to walls and membranes and were difficult to remove. "More importantly, topographical analyses indicated that space-grown crystals were of higher perfection than the ground crystals and had more uniform, sharper diffracted images," he said. Klaus was one of about a doz...

University of Chicago researchers uncover first steps in cell-cell adhesion process

...ence microscopy images as yellow dots on the outer membranes of adjacent cells. Scientists call these dots "pu...wo perfect rows of dots, or puncta, along the cell membranes between two adjacent cells," said Vasioukhin. Puncta on adjacent cells lined up perfectly with one...

Algal food quality, not quantity, critical factor in healthy lake ecosystems

...ega-3 fatty acids play in maintaining healthy cell membranes and helping form important hormones in animals, Brett said. "Interestingly, eicosapentaneoic acid is the same dietary fatty acid that is thought to be the healthy component of fat-rich fish like salmon and tuna in human diets." Also participating ...

Learning how cell's tiny motor powers its mobility

... chromosomes during celldivision, and transport of membranes or proteins within cells. "The kinesin motors responsible for this transport are the world's smallest moving machines,even the smallest in the protein world," he said. "So, besides their biological significance, it'sexciting to understand how these...

Humboldt prize will enable Colorado State chemist to join German colleagues in studying behavior of molecules on cell surfaces

...es, and particularly in the proteinfound on B-cell membranes called an "antigen-presenting" molecule that helps... interest him. Key protein molecules on the cells' membranes tendto stay within specified regions and rarely move outside those domains. Barisaswants to know why...

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