Tag: "channel" at biology news
Scientists document water molecule movement across cell walls
...simulations revealed that water molecules pass the channel
single-file. Upon entering, the water molecules face with their oxygen atom down the channel. Midstream, they reverse orientation, facing with the oxygen atom up. While passing through the channel, the ballet of water molecules streams through, alw...
Study of vision disorder leads to discovery of new family of ion channels
... at least three other members of this chloride ion channel
family in humans, four in the fruit fly and 24 in ...cademy of Sciences , is the first new chloride ion channel
to be described since the cystic fibrosis transmembrane conductance regulator was discovered more th...
APS announces its 2002 Young Investigators Awards
...erested in investigating how the epithelial sodium channel
protein is modulated on a cellular and molecular l...in this protein that are likely involved in sodium channel
Transgenic mice mimic cardiac hypertrophy in humans
... protein, called the intercellular calcium release channel
(ICRC), which creates an opening in the sarcoplasmic reticulum membrane. The channel
protein, also known as the ryanodine receptor, acts like a microscopic valve that either opens or cl...
Physics tip sheet #4 March 13, 2002
... of potassium. The quadruple helix structure has a channel
down the center that fills with potassium ions and has electronic properties like those of a semiconductor. Wires such as these may form the basis for nanoelectronics. Preprint: http://www.arxiv.org/abs/cond-mat/0203139 3) Measuring gravity change...
Researchers create simulation of chemical/biological release in Salt Lake City as precautionary measure
...s adjustments for how the buildings will block and channel
the flow between them along street "canyons" (such as those found on downtown streets between high-rise buildings). The simulation program, which will be capable of simulating a chemical, biological or radiological release in an urban environment a...
Johns Hopkins scientists find brain's nose plug
...in as an electrical signal. The "nose" is really a channel
in the neurons' membrane that opens when an odor i...ined the electrical behavior of CNGA4 and the odor channel
in isolated cells. The channel
opens in response to one molecule (cAMP), letting charged calcium ato...
Tether for water channels found: May impact research on brain swelling
...annels where they belong. By tethering the water channel
protein, Aquaporin-4 (AQP4), to the tips of brain ...s suggest. "We think the interaction of the water channel
and its tether helps regulate water flow in the brain," says lead author John Neely, Ph.D., a second...
Pheromones control sex discrimination in mice
...roduced knockout mice that lacked an important ion channel
thought to mediate pheromone signaling in the VNO, called TRP2. Previous studies revealed that TRP2 is found exclusively in the VNO. "To our great surprise -- and, at first, disappointment -- we found that these knockout males were perfectly able to ...
Making plants better lovers: Scientists find gene responsible for reproductive success in plants
...ve discovered that the presence of a potassium ion channel
in pollen increases reproductive success. During p...he Arabidopsis gene, SPIK, encodes a potassium ion channel
that is found specifically in pollen. Potassium ion channels play crucial roles in a variety of cel...
Hopkins scientists identify molecular details of water transport in the lung
...of the study. "The aquaporin-1 protein is a water channel
that regulates water movement into and out of cell...f biochemistry, discovered a protein that formed a channel
or pore through which water could travel into and out of the cell. Since then, scientists have iden...
Research may lead to jump-starting damaged nerve cells
...lls to make their own set of chemicals, called ion channel
proteins. These ion channel
proteins then attach to certain places on the nerve cells membrane, where they channel
Another transmembrane protein structure solved by Rockefeller scientists
Chloride ion channel
strikingly different from potassium kin "Why did... three-dimensional structure of a type of chloride channel
called the ClC. The high-resolution crystallographic images published in Nature represent another...
Images reveal how body regulates salt uptake in cells
...biochemical studies that failed to explain how the channel
works. It is a complicated structure, said MacKinn...idney and muscle, have been linked to chloride ion channel
mutations. People with Thomsens disease, for example, have chronic muscle stiffness and delayed abil...
January media highlights: GEOLOGY and GSA TODAY
...istinctive morphological features such as internal channel
systems and delicate external columns and plumes that are characteristic of modern biofilms. This discovery of recognizable biofilms in rocks up to 500 Ma provides a new way of identifying fossil bacteria, not only on Earth, but also in rock samples ...
Scientists identify molecular structure of cancer-related proteins
...galaghatta Rajashankar. The image clearly shows a channel
in a specific surface area of the receptor. The channel
has a high affinity towards the ligand, which contains a loop that penetrates deep into the channel
Aquaporins - the perfect water filters of the cell
... (Science 14 December 2001). Aquaporins are water channel
proteins; they are located in the otherwise wateri...ics. The structure showed that the protein forms a channel
in the membrane that is 2 nanometers (billionth meter) long and 0.3 nanometers wide, just large enou...
Columbia team finds treatment that corrects cellular defect at the root of heart failure
... research demonstrates that defects in the calcium channel
controlling heart muscle function occur in heart f...mbrane surrounding a cell contains a small calcium channel
stimulated by the electrical impulses driving heart rhythm. When stimulated, this calcium channel
December Media Mighlights: GEOLOGY and GSA TODAY
...cks and a change from high- to low-sinuosity river channel
systems. The authors show that the pattern of vertebrate taxa disappearing below this boundary, and the subsequent appearance of new taxa above the boundary, are consistent with a relatively sudden, possibly catastrophic event that lasted 50 k.y or l...
Early detection device for exposure to chemical warfare agents being developed
...pupil and temporarily increasing the fluid outflow channel
of the eye. When the Germans looked at phosphates, they found the phosphate group stuck to the target site, creating an essentially irreversible bond that renders cholinesterase inactive and leaves muscles contracted. Dr. De Luca calls the surface E...
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