Tag: "acid" at biology news
Bacteria live in the esophagus!
... didn't believe that bacteria could survive in the acid
environment of the stomach. But in the early 1980s, researchers discovered that the bacterium Helicobacter pylori lived in the stomach and is associated with ulcers. Antibiotics are now routinely used to treat ulcers. In subsequent years, Dr. Blaser ...
Obesity drug inhibits prostate tumor growth
...lls are affected by an increased activity of fatty acid
synthase. Fatty acid
synthase is the enzyme that converts dietary carbohydrate to fat. The screen also identified orlis...
Scientist works to interrupt early changes resulting in diabetic vision loss
...-of-control substances such as glutamate, an amino acid
plentiful inside ganglion cells where it works as ... in the level of homocysteine, an excitatory amino acid
that, like glutamate, can stimulate the NMDA receptor. Additionally, high glucose may impair other ...
Ontario researchers see increase in taste and odour-causing algae problems
... new evidence suggesting that disturbances such as acid
rain and climatic warming may produce significant, unprecedented changes to the algae of inland lakes, with important implications for water quality." Lake water that smells and tastes foul can be traced to a variety of sources, including chemical po...
Top US scientist honored with prestigious award
...the parasite scavenges a crucial molecule - sialic acid
- directly from its host's surface cell and transf...'s surface via a unique catalytic reaction. Sialic acid
plays a key role in helping the parasite attach itself to the host and can also reduce the effective...
Scripps scientists describe dangerous cocktail of alcohol, brain peptides, and neurotransmitters
...icular neurotransmitter called gamma amino butyric acid
(GABA). "There is a strong relationship be...e on a neurotransmitter called gamma amino butyric acid
(GABA). GABA is the main inhibitory neurotransmitter in the brain, and neurons in every brain region...
UVa researchers describe method of protecting chromosomes during cell division
...ids. The researchers identified the specific amino acid
on MCAK that was modified by Aurora B, and showed that the modification regulates MCAK activity. Cell injection studies showed the sites where this modification happens, which is crucial for the correct attachment of chromatids and microtubules dur...
Transporter's function provides support for eating vegetables, limiting antibiotics
...y that if, in fact, we keep this short-chain fatty acid
transporter healthy, we then can keep the whole immune system healthy." Immune cells also have a specific receptor for short-chain fatty acids on the cell surface, and Drs. Ganapathy and Martindale are pursuing the idea that the SLC5A8 transporter i...
JCI table of contents, March 1 2004
...************************** Inactivating the fatty acid
transport protein FATP1 prevents fat-induced insul...s causing insulin resistance remain unknown. Fatty acid
transport protein (FATP1) is expressed in cells and tissues such as skeletal muscle, adipose tissue,...
Drugs limit deadly side effects of graft-versus-host disease
...n HDAC inhibitor called suberoylanilide hydroxamic acid
(SAHA) to one group of experimental mice that received allogeneic transplants. When researchers compared results in these mice to results in mice given the same type of bone marrow transplant, but not the HDAC inhibitor, they found: The drug impro...
Carbohydrates offer some help in muscle protein synthesis, but not enough for the desired effect
...nsulin concentration causes a fall in plasma amino acid
concentrations, and this reduced amino acid
availability could potentially counteract a direct effect of insulin on synthesis. A past study foun...
Purdue chemists 'put the twist' on protein building block
...molecular structure, tryptamine can form the amino acid
tryptophan, which is incorporated with other amino acids in long chains to form proteins. The character of tryptamine fascinated Zwier because it has within its structure the molecular equivalent of a series of hinges - chemical bonds that allow part...
Just how much water do we really need? The answer may depend on our age
...ny of these same participants using p-aminobenzoic acid
(PABA) to confirm completeness. The data obtained ...sure 24-hour urine production using p-aminobenzoic acid
to ensure complete collection. Preformed water intake was calculated from isotopic turnover and corr...
Insights gained from molecular modeling may lead to better insecticides
...like keys going into locks, Baudry said. The amino acid
residues in the catalytic site stabilize the toxic substrate so it is optimally bonded with the proteins heme, an iron-containing pigment in the catalytic site that mediates oxidation of the chemical to a non-toxic product. In the earworm protein, m...
Symposium relates long-term ecological research to ecosystem management
... management in Florida's Everglades,remediation of acid
mine drainage in the western United States,and marine reserves in coastal ecosystems are some of the topicsthat ecologists will explore February 26th, at a symposium on the"Application of LTER Science to Ecosystem Management." Thesymposium will be h...
Protein inhibits cell growth, may contribute to breast cancer
...hat one of these drugs, suberoylanilide hydroxamic acid
(SAHA), has on cdk6. "These data place cdk6 as a major regulator of breast epithelial growth," said Dr. Gelfand, Chairman of Pediatrics at National Jewish. "They suggest that if we can keep cdk6 levels up in breast tumors, we may be able to prevent t...
Evolution caught in the act
...rchers' surprise, a mutant carrying only two amino acid
changes, amounting to less than 2 percent of the t...s Collet, Bardwell's team found that the two amino acid
substitutions in thioredoxin cause a remarkable transformation: they result in the binding of two ir...
Flies offer clues to anesthesia-resistant memory
... membrane to release a chemical called arachidonic acid
(AA). While the mechanism of action of AA in stabilizing memory still is unknown, this molecule has already been implicated in memory formation in chickens and rodents. The current genetic findings from flies therefore suggest that the radish/phospho...
Local, regional governments could take lead in curbing global air pollution
... she said, because it is most directly affected by acid
rain resulting from Chinese pollution. The other nations also are affected, but in Canada and the United States the effects often are confined to smaller regions, mostly along the West Coast. "Many of the same activities that produce global climate ...
Scientists at Scripps Research Institute describe structure of receptor on surface of 1918 flu virus
... protein that forms from three identical 550 amino acid
chains, hemagglutinin is abundantly displayed on the surface of the influenza virus. It is the receptor responsible for the virus infecting cells of the host organism. During an infection, the virus enters the airways and travels to the epithelial c...
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