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Tag: "uptake" at biology news

Carnegie Mellon scientists find key HIV protein makes cell membranes bend more easily

... change in the shape of gp41, which in turn drives uptake of HIV RNA and proteins by the T cell. But the Carnegie Mellon work suggests that FP-23 plays another, equally important function — reducing the free energy of curved fusion intermediates. These fleeting shapes arise and disappear as HIV enters a T c...

Scientists close in on missing carbon sink

...le, "Weak northern and strong tropical land carbon uptake from vertical profiles of atmospheric CO2," was wr... that the models were overestimating the amount of uptake in the north and underestimating uptake in the tropics," says Kevin Gurney of Purdue University, a c...

Scientists: As rainfall changes, tropical plants may acclimate

... the tropics. But it comes with a caveat: Nutrient uptake is only one of many ingredients in plant life. Oth...t will change with precipitation changes ?nutrient uptake ?might not affect tropical plants. That said, plenty of others could, Schuur said. ...

UCLA AIDS Institute researchers find a peptide that encourages HIV infection

...his area, at least, agents that enhance retroviral uptake could contribute to an emerging field of medicine." "So many people have tried to deliver genes into different kinds of cells," said study co-author Shen Pang, adjunct associate professor at the UCLA School of Dentistry and a member of the UCLA A...

'Short-circuit' found in ocean circulation

...inks all the other oceans, and is also relevant to uptake and release of carbon dioxide by the sea ?transport between the deep and surface waters in the Southern Ocean is particularly important for this process. Understanding oceanic circulation is important because it distributes heat, carbon and nutri...

Heart failure: Intervention possibilities from imaging programmed cell loss

...e damaged heart muscle. "We discovered that higher uptake was uptake with a worse outcome. Cell death is one of the biological events that worsens left ventricular event...

Researchers learn what sparks plant growth

...d the genetic factors that regulate production and uptake of the hormone in the different layers of plant tissues. According to Chory, brassinolide is a potent growth hormone involved in the plant’s response to light. Such responses, which include adjusting plant growth to reach light or strengthening stems...

How fish species suffer as a result of warmer waters

...eveals that a warming induced deficiency in oxygen uptake and supply to tissues is the key factor limiting t...egener Institute show the key importance of oxygen uptake and distribution ?through respiration and blood circulation ?in setting the animals' thermal toleran...

New mechanism for nutrient uptake discovered

... cell's surface physically interact to control the uptake of a vital nutrient, nitrogen. It is the first tim...fied the genes responsible for initiating nitrogen uptake in plants. That identification has helped other researchers find the relatives of these genes in a v...

Biodiesel won't drive down global warming

EU legislation to promote the uptake of biodiesel will not make any difference to global warming, and could potentially result in greater emissions of greenhouse gases than from conventional petroleum derived diesel. This is the conclusion of a new study reported today in Chemistry &...

'Terror bird' arrived in North America before land bridge, study finds

..." MacFadden said. "This is the first time that the uptake of rare earth elements during the early stage of fossilization has been used to determine the age of fossils in North America." Geologists have used the technique to study igneous and metamorphic rocks, but only one other researcher worldwide has ...

Cells selectively absorb short nanotubes

...f toxicity. "Our results demonstrate that cellular uptake in these lung cells depends significantly on the length of the nanotubes," Becker explains. "This is the first of many steps in the critical goal of reducing health risk by de novo engineering of the nanotubes themselves." ...

How mammals fuel milk production may have implications for cancer

...ically, the mammary cells failed to increase their uptake of glucose, cells?primary energy source, and their... ability to act as a central regulator of nutrient uptake and utilization is consistent with the frequent observation of constitutive activation of the PI3K/A...

The biggest bug in gut discomfort

... bug had evolved a special mechanism to induce its uptake into these nonphagocytic cells and establish its own intracellular niche. Watson and Galan set out to follow C. jejuni down the host cell’s endocytic pathway. Much of the cell’s incoming traffic is usually routed to compartments called lysosomes, whe...

Bitter taste identifies poisons in foods

... body's metabolism. Glucosinolates inhibit iodine uptake by the thyroid, increasing risk for goiter and altering levels of thyroid hormones. The ability to detect and avoid naturally-occurring glucosinolates would confer a selective advantage to the over 1 billion people who presently have low iodine stat...

Cell wall of pneumonia bacteria can cause brain and heart damage

...ted that this pathway is responsible for bacterial uptake into these cells. Furthermore, the researchers succeeded in blocking a key enzyme of this pathway in cardiomyoctyes using a molecule called PLC inhibitor U73122. The treatment prevented the cell from taking up the fragments but did not appear to inte...

Metal homeostasis research in plants will lead to nutrient-rich food and higher yielding crops

...he essential Iron transporter responsible for Iron uptake from the soil. This Iron transporter is IRT1. In ...t and Cadmium. Thus, any attempts to increase Iron uptake via IRT1 must consider the transport of unwanted substrates such as Cadmium. Industrial, mining, ...

Radioactive scorpion venom for fighting cancer

...e iodine prior to the therapy to block the thyroid uptake of I-131. When the patient returns home several hours after the procedure, there are radiation doses to any family members at home due to the presence of radiation in the patient's body. Such radiation exposures to family members, Jackson found, ...

Iron critical to ocean productivity, carbon uptake

...e than was previously thought. Global ocean carbon uptake is estimated at 50 billion tons, so the reduction in the estimate of the uptake is significant ?about 2 to 4 percent. Results of the study were published this week in the journal ...

Ocean acidification threatens cold-water coral ecosystems

...naturally less hospitable for coral growth." The uptake of CO2 by oceans initiates a series of chemical reactions that increase acidity and decrease carbonate ion concentration in seawater. Corals and other marine organisms (e.g. some species of plankton and mollusks) use carbonate ions to build their ske...

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