enzymes 2 9

Tag: "enzymes" at biology news

Schepens scientists are first to discover angiogenesis switch inside blood vessel cells

...d, is turned on and off by the balance between two enzymes (known as PI3K and PLCg) that compete for the use ...ff a series of signaling activities carried out by enzymes within the cells. Two of those enzymes are PI3K and PLCg, which then search for their favorite lipid...

Researchers discover which organs in Antarctic fish produce antifreeze

...s that primarily manufacture and secrete digestive enzymes that break down food in the intestine so it can be absorbed. In this case, AFGPs are secreted into the intestinal lumen where they protect the intestinal fluid from being frozen by ice crystals that come in with seawater and food. Internal fluids in...

When it comes to gene transcription, random pauses aren’t quite so random, study finds

...n the heels of the team's 2003 discovery that RNAP enzymes routinely make thousands of brief stops ("ubiquito...s the same sequence again? "It turns out that RNAP enzymes may have individual personalities, but no memories," Herbert explained. "That is, they exhibit a dis...

Promising cell protein may play role in infection and dry eye

...s interaction with Rb2/p130 and chromatin modeling enzymes may affect how PAI-2 is expressed. "There is a different expression of the protein between the epithelium of the cornea and conjunctiva cells," says Massaro-Giordano, an assistant professor of ophthalmology, cataract and refractive surgery at Schei...

UCSD researchers develop 'smart petri dish'

...study. "This is important because we know that the enzymes that metabolize drugs--the P450 family--are very different in animal and humans. This is one of the reasons many drugs clear animal testing but end up toxic in patients. This type of sensor could help us predict human liver responses without patient ...

Scientists take 'snapshots' of enzyme action

...soluble in water. The body uses two main groups of enzymes -- flavin-containing monooxygenases (FMOs) and cytochrome P450s -- to convert these compounds to soluble forms that can be easily excreted. "For FMOs, the end result -- that an oxygen atom gets added to make these compounds soluble -- is simple," Sw...

Compound in dairy products targets diabetes

... and regulates gene expression. This increases the enzymes that process fatty acids and also increases the tissues' sensitivity to insulin. "We wondered if CLA was using the same mechanism, in which case it could be used as an anti-diabetes drug," Vanden Heuvel says. To test the idea, he used CLA on...

Methane-belching bugs inspire a new theory of the origin of life on Earth

...protocell" containing primitive forms of these two enzymes could then have generated biochemical energy by co...idence can pinpoint the age of Pta, "but these two enzymes always work together," suggesting that they evolved together. The two enzymes' primeval genetic prov...

Biofuels researcher searches for new sources

... Carolina State University to screen chemicals and enzymes that pretreat and convert biomass into sugars. "Biomass energy can contribute to cleaner air through reduction in greenhouse gas emissions. It can alsoimprove rural economies, and reduce energy dependence on foreign petroleum oils," said Ralph Peck...

Lack of key enzyme associated with development of rare tumor

... important enzyme. The enzyme is one of a class of enzymes involved in halting a cell's response to hormones ... 11A (PDE11A). Phosphodiesterases are a family of enzymes involved in "switching off" a cell's response to hormones, Dr. Stratakis explained. For a hormone t...

Reversing 'hibernating' heart muscle focus of UB researchers

...ndrial respiration and of the activity of specific enzymes in the swine model," said Canty. "This work relies on the state-of-the art proteomic research facilities and mass spectrometry at UB. "By using therapies similar to those that are used clinically in patients, such as angioplasty and adenoviral g...

Variations in detoxifying genes linked to Lou Gehrig's disease

Genetic variations in three enzymes that detoxify insecticides and nerve gas agents as...ome 7q21.3, code for the production of detoxifying enzymes involved in the metabolism of a variety of drugs, organophosphate insecticides, such as parathion, d...

What controls stickiness of 'smart' chromosomal glue

...n be retained at the centromeres during meiosis by enzymes that remove phosphates from the cohesins, counteracting the effects of phosphorylation. Amon and her colleagues found that phosphorylation was not the only process essential for cohesion removal. Recombination ?an exchange of DNA between chromosome...

Researchers find protein that silences genes

...the histones a pathway is set in motion to recruit enzymes to perform DNA methylation. Likewise, changing DNA methylation leads to changes in histone modification". Pikaard's other collaborators, all experts in microscopy, are researchers from the Instituto Superior de Agronomia, Tapada da Ajuda, in Lisbon...

No-mow grass may be coming to your yard soon

...nts and animals. "Remarkably, steroid biosynthetic enzymes are highly conserved from plants to metazoans (animals), suggesting that the use of steroids as hormones preceded the plant-animal split over a billion years ago," Chory explained. In animals, the route steroid hormones use to exert their influence...

Weizmann Institute scientists discover a molecular security mechanism for keeping mutations in check

...prior to cell division) are members of a family of enzymes called DNA polymerase. DNA polymerase travels alon...s may seem paradoxical ?intuitively, more careless enzymes should mean more mutations ?each of these enzymes is tailored to deal with certain specifics types o...

Researchers discover how bacteria sense their environments

...graphy to determine the structure of receptors and enzymes and a novel spectroscopic technique for measuring interactions between them, Crane's group was able to develop a model for how the complex of receptors is organized. Jack Freed, Cornell professor of chemistry and chemical biology and director of the ...

Bacteria could make new library of cancer drugs that are too complex to create artificially

...nt of the University of Warwick have looked at the enzymes controlling the process that allows the bacterium ... gained a clear understanding of which are the key enzymes that act at particular steps of that process. By manipulation of the enzyme content of the bacteria,...

ABCB6 is key to production of heme in hemoglobin

...lobin, as well as a critical part of certain liver enzymes that break down toxins, and so-called "respiratory chain" enzymes in mitochondria that use oxygen to produce energy-rich molecules. The discovery of the location a...

Gut reaction: Researchers define the colon's genome

...man genome. Some of these microbial genes code for enzymes that humans need to digest food, suggesting that bacteria in the colon co-evolved with their human host, to mutual benefit. "The GI tract has the most abundant, diverse population of bacteria in the human body," remarks lead author Steven Gill, a mo...

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