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Tag: "takes" at biology news

A gene's first 'kiss' sets off that affair known as puberty

... to be triggered by the brain's own version of "It takes two to tango," whereby a signal literally gets turned on by a molecule that is produced by a gene aptly named KiSS-1. The couple ?a biochemical equivalent to Adam and Eve ?makes its sudden appearance in a region of the brain called the hypothalamus ...

Timing is everything: First step in protein building revealed

...eces of the ribosome come together,and how long it takes them to fall apart under various circumstances.Their results support the idea that two separate steps take place oncethe instruction's starting point is found: first a structural change inthe ribosome complex, and then release of eIF1.Lorsch's goal i...

Sea skate experiment sheds light on human cell transport

...ne and a chemical process known as phosphorylation takes place. This activates the gates, which open to release excess water along with salts and other organic material. The researchers made their discovery by using a plant-based substance to block an enzyme that causes phosphorylation. The result: The ga...

Poplar trees redirect resources in response to simulated attack

...s going to the roots, but not the chemical form it takes there," Ferrieri said. "We will have to do more tests to see what compounds are formed." Ferrieri believes there may be an increase in compounds that resist microbial attack after plants have soaked up atmospheric carbon dioxide, therefore counterin...

Discovery of key protein's shape could lead to improved bacterial pneumonia vaccine

... binds to a molecule on thecell called pIgR, which takes antibodies from the bloodstream on oneside of the cell and transports them to the other side. There itreleases the antibody at the lining of the throat and lungs. If apneumococcus bacterium is hovering on the lining of the respiratorytract, this germ...

New comparative toxicogenomics database

... binds to a molecule on thecell called pIgR, which takes antibodies from the bloodstream on oneside of the cell and transports them to the other side. There itreleases the antibody at the lining of the throat and lungs. If apneumococcus bacterium is hovering on the lining of the respiratorytract, this germ...

UCSD researchers maintain stem cells without contaminated animal feeder layers

... For a proposed animal-free medium, the UCSD study takes advantage of a previously unidentified soluble factor this is secreted from mouse feeder layers to maintain stem cells' undifferentiated state and pluripotency, the ability to become all tissue types in the body. The scientists knew that a cocktail o...

Open microfluidic and nanofluidic systems

...y forces between substrate material and liquid and takes the ‘freedomâ€TM of contact angles at pinned contact lines into account. Such a contact line is visible in the upper right image in Figure 1. In such a situation, the contact angle is not determined by the classical Young equation but can vary over...

Scientists reveal molecular secrets of the malaria parasite

...he Science paper is important because: * The study takes an"evolutionary approach" to exploring how the Plasmodium genome hasevolved. By comparing four sequenced genomes (the human malaria P.falciparum and the rodent malarias P. yoelii, P. chabaudi and P.berghei), the scientists found that the major differ...

Jumping gene helps explain immune system's abilities

...hisprocess, the researchers say."The immune system takes an approach to protein building similar tothat of diners creating a meal at a cafeteria, but how the immunesystem's 'a la carte' process happens is still murky," says Craig.But the a la carte approach provides great diversity from a limitednumber of ...

UCSD Discovery Shows How Embryonic Stem Cells Perform 'Quality Control' Inspections

...hisprocess, the researchers say."The immune system takes an approach to protein building similar tothat of diners creating a meal at a cafeteria, but how the immunesystem's 'a la carte' process happens is still murky," says Craig.But the a la carte approach provides great diversity from a limitednumber of ...

New therapy for HIV/AIDS eliminates needles and excessive toxicity

...hisprocess, the researchers say."The immune system takes an approach to protein building similar tothat of diners creating a meal at a cafeteria, but how the immunesystem's 'a la carte' process happens is still murky," says Craig.But the a la carte approach provides great diversity from a limitednumber of ...

DNA Recombination and Repair—A New Twist to RecA Function

...ssociate from a fiber in the time—three seconds—it takes for an individual RecA molecule to burn one ATP. This implies a filament organization in which every RecA molecule hydrolyzes ATP in synchrony with the sixth RecA molecule to its left and the sixth RecA molecule to its right. The authors note that t...

Gene sequencing explains bioremediation 'bug'

...hisprocess, the researchers say."The immune system takes an approach to protein building similar tothat of diners creating a meal at a cafeteria, but how the immunesystem's 'a la carte' process happens is still murky," says Craig.But the a la carte approach provides great diversity from a limitednumber of ...

The Shapes Of Life: NIGMS Project Yields More Than 1,000 Protein Structures

... many proteins simultaneously, cutting the time it takes to determine a single protein structure from months to days. For example, a robotic arm drops protein solution into thousands of tiny wells for crystallization trials, and an imaging system quickly scans the wells looking for signs of crystal formati...

Bird Brains Show How Trial and Error May Contribute to Learning

...n bird song by manipulating this region. Learning takes some time, so Kao expected to wait for her results. But stimulating the LMAN had an immediate impact. The tune and rhythm of the basic song did not change, but a tiny burst of electricity would show up a few notes later as a change in volume or pitch...

Scientists discover that host cell lipids facilitate bacterial movement

...ell and begin the cycle anew. Essentially Listeria takes over or hijacks the host cell's actin cytoskeleton to move within cells, and to spread from cell to cell." In most cells, two membrane lipids, PIP2 and PIP3, are associated with the formation of new actin filaments. PIP3 is synthesized from PIP2 by ...

New Treatment Rivals Chemotherapy For Lymphoma, Study Finds

...ounds. A new form of treatment for lymphoma that takes a fraction of the time of traditional chemotherapy... "The results of this treatment, which essentially takes only one week to complete, rival any kind of treatment that's been used for follicular lymphoma, inc...

Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin

...s really going to its intended target." This work takes advantage of years of effort in the Therien laboratory focused on the design of highly fluorescent compounds. Polymersomes, which were developed by Penn professors Daniel A. Hammer and Dennis Discher in the mid-1990s, function much like the bilayered...

Potential treatments for neurofibromatosis

...ot enough neurofibromin is produced, cell division takes off and tumors develop. "It's like an engine being driven at full speed," said Dr. Clapp. To encourage development of the blood vessels they need, the tumors emit chemical signals that cause the mast cells to congregate in tissues surrounding the t...

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