Tag: "membrane" at biology news
Device creates electricity and treats wastewater
...with a conductive wire. In a hydrogen fuel cell a membrane
separates the anode and cathode chambers. When hy...otons and electrons, with protons going across the membrane
to the cathode chamber, and electrons passing over the wire between electrodes to create a current. ...
Actin moves chromosomes: Discovery changes fundamental thinking
...t unites with a sperm. When the protective nuclear membrane
surrounding the chromosomes breaks down during mei...tous actin forming in the region where the nuclear membrane
breaks down. This network acts as a fishnet to gather all the chromosomes together and drag them clo...
UIC researchers show protein routes messages in nerve cells
...4.1 in humans -- links receptors on a nerve cell's membrane
to its internal structure, or cytoskeleton. Because 4.1 only interacts with certain receptor proteins, it functions as a sorting agent to ensure that only the correct type of receptor gets attached. The work by the researchers also identifies the cyt...
Researchers at UGA provide first look at protein expression in Chagas disease-causing parasites
...site or touch it and then touch a vulnerable mucus membrane
site such as the eyes. Despite the widespread nature of the disease, available treatments are unreliable, and no vaccine against the parasite has ever been developed. That's why Tarleton and his colleagues studied the T. cruzi "proteome"--proteins i...
Beyond genes: Lipid helps cell wall protein fold into proper shape
...ll membranes, play a direct role in the folding of membrane
proteins proteins that penetrate the membrane
or bind to either side of it. "What we've demonstrated again is that it's not just a membrane
Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy
...ase in fluorescence, providing direct evidence for membrane
damage. When U-M scientists repeated the stretch test after bathing both types of cells with a solution of poloxamer 188, they found that it restored the ability of mdx myocytes to handle a 20 percent stretch without damage or increased levels of cal...
Unique interplay between tumor and blood vessel cells promotes angiogenesis and tumor growth
...y tumor cells can directly interact with the outer membrane
of adjacent blood vessel cells and influence growth and development. The research, published in the July issue of Cancer Cell, may provide a new and more efficient target for antiangiogenic therapy. Tumor cells, like other cells, require blood vessel...
Light-sensing protein illuminates sun-loving ocean bacteria
...ear the ocean's surface contain proteorhodopsin, a membrane
protein able to harness sunlight's energy, according to a new study by Oded Beja and colleagues in the open-access journal PLoS Biology . Given the dearth of nutrients in their environment, these oligotrophic bacteria must generate their energy fro...
'Achilles' heel' of the herpes virus possibly found
... important to HSV's ability to fuse with the fluid membrane
that encloses every human cell. The researchers we...archers were able to show that B5 sits in the cell membrane
with one end of the protein exposed outside of the cell ready to link up with viruses -- or to serve...
Deep thinking: Scientists sequence a cold-loving marine microbe
...ses a number of duplicated genes important to cell membrane
biosynthesis. What's more, C. psychrerythraea dresses in layers, generating plenty of extracellular polysaccharides (sugars) that coat cell membranes. Aside from its cellular outerwear, C. psychrerythraea generates a range of potential cold-prot...
Corn fungus is nature's master blaster
...re. Such pressure is due to water flowing across a membrane
into the perithecium as it tries to equalize the concentration of a salt solution inside the chamber. In the case of the fungus, at question was whether the sugar mannitol or potassium ions were responsible for the osmotic pressure that generated the...
MIT engineers an anti-cancer smart bomb
...Department of Chemistry. The team loaded the outer membrane
of the nanocell with an anti-angiogenic drug and t.... Once the nanocell is inside the tumor, its outer membrane
disintegrates, rapidly deploying the anti-angiogenic drug. The blood vessels feeding the tumor then ...
U Iowa researchers prevent hereditary deafness in mice
...taining the interfering RNA was placed against the membrane
covering one opening into the inner ear of the mice. The slightly porous membrane
allowed the interfering RNA to diffuse into the inner ear cells. Although the UI team was successful...
Critical step traced in anthrax infection
... scientists. Because the water-filled lumen of the membrane
pore is smaller than the folded lethal factor and ...th cellular systems and model electrophysiological membrane
systems were used to test the potency of the anthrax toxin. "We tried to bridge reductionist science...
Studies reveal how plague disables immune system, and how to exploit the process to make a vaccine
...s two roles. It helps the needle to penetrate the membrane
surrounding the target cell. It also suppresses the immune response. LcrV causes affected cells to release 40 times the normal levels of interleukin 10 (IL-10), which dampens down the immune response. LcrV also prevents secretion of tumor necrosis...
Immune system's distress signal tells bacteria when to strike back
...pted by a protein, called OprF, found on the outer membrane
surface of Pseudomonas. This serves an early warning system. Once Pseudomonas detects the first signs of a brewing immune response, they also begin to prepare for battle, gathering information and responding with their own counteroffensive. Thei...
Penn researchers discover key to how SARS virus infects cells
...e step to infect the cell. The proteins within the membrane
of both SARS and Ebola need to be cut by special c...side the vesicle, facilitating fusion of the viral membrane
and the vesicle membrane, so that viral proteins and nucleic acids can enter the cell where viral re...
Tissue regeneration operates differently than expected
...tem and muscle cells were spatially separated by a membrane
between both cell types. The researchers conclude that this experiments proofs that cell fusion of mesenchymal stem cells and muscle cell but not their transdifferentiation forms the basis for the regeneration mechanism. Additional experiments were f...
Breakthrough: Structure of membrane protein described by Hebrew University, German researchers
Jerusalem --- The structure of the membrane
protein NhaA has been revealed by researchers at t...ns. Until now, the structure of fewer than 50 cell membrane
proteins have been discovered, as opposed to 30,000 soluble proteins. "The location of the proteins ...
Discarded placentas deliver researchers promising cells similar to embryonic stem cells
...rt of the placenta called the amnion, or the outer membrane
of the amniotic sac, is comprised of cells that have strikingly similar characteristics to embryonic stem cells, including the ability to express two key genes that give embryonic stem cells their unique capability for developing into any kind of spe...
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