Tag: "proton" at biology news
ASU Scientists Make Major Breakthrough With Photosynthetic Energy
...inside. The pumping action creates an imbalance in proton
concentration across the membrane, causing the protons to flow through a protein and generate biological energy. Gust said, "The focus is on how to capture solar energy and convert it to a useful form in the same way that photosynthesis does. We ar...
Structure Of The Plasma Membrane Proton Pump Offers A First Glimpse Of The Mechanism Of Ion Pumping Across Membranes
... the structure of the plasma membrane proton
ATPase at a resolution of about 0.8 nm by electron...vol. 392, 23 April 1998, 840). The proton
ATPase is a membrane protein which uses energy derived from ATP hydrolisis to pump prot...
Very Fruitful Collaboration Between French And German Scientists Yields Unusual Insights Into The Structure Of Membrane Proteins
...e structure-function relations in the light-driven proton
pump bacteriorhodopsin. Using neutron...till remain unclear. The light-driven proton
pump bacteriorhodopsin, the photosynthetic retinal-protein in the cell walls of the sal...
Breakdown of penicillin by resistant bacteria elucidated
...ctamase destroys the bond by first adding a single proton
to it to destabilize it and make it easier to break. "Knowing more accurately the chemical and physical basis of the interaction of penicillin and b-lacatamses will help in structure-based drug design," Makinen says....
Spring meeting press conferences
...ever global images of the plasmasphere and Earth's proton
aurora. Panelists will discuss the implications of these images for our understanding of magnetospheric physics and space weather. Panel: James L. Burch, Principal Investigator, IMAGE; Vice President, Instrumentation and Space Research Division, So...
Fuel cell research center to develop and test new technologies
...ing technologies for compact, small-scale or micro proton
exchange membrane fuel cells; (5) development of an advanced room-temperature, sodium-based battery for high power and energy density; (6) development of new electrode alloys and polymer electrolytes for lithium batteries; (7) development of new meth...
Measuring alcohol levels in breath, blood and now the brain
...ns throughout the brain. The technology is called proton
(1H) magnetic resonance spectroscopy (MRS). 1H MR...arch has refined this ability even further, using proton
(1H) magnetic resonance spectroscopy (MRS) to directly measure alcohol concentrations throughout the...
UF scientists discover novel mechanism underlying bone destruction
...kdown. The connection between the enzyme, vacuolar proton
adenosine triphophatase or V-ATPase, and the osteoclasts may provide a novel target for future medications to block the bone erosion associated with osteoporosis and the deadly metastatic bone diseases that stem from breast and prostate cancers. ...
New technique answers one of waters basic mysteries
...ed a complex computer simulation that showed how a proton
is torn away from a water molecule. The pH is a me...tion creates a quick electrical field that pulls a proton
from the central molecule. Less than a billionth of a second later, the formation breaks and the pro...
UC Berkeley chemists detail secrets of ionization, reasons behind water's central role in chemistry of life
...a trillionth of a second. Yet, the separation of a proton
- a hydrogen atom missing its one electron - from ...time, the electric field quickly dies away and the proton
snaps back. "The electric field vanishes rapidly - it only lives for tens of femtoseconds - and then...
E. coli bacteria may be more useful than you think
...cal potential across the membrane to drive one-way proton
flow, we will have a controllable turbine," Manson claims. "In addition to direct applications of this technology to microfluidics or nanoscale generation of electrical power, it may be possible to use the bioengineering principles revealed to build ...
Abstinence may make the brain grow stronger
...nts underwent magnetic resonance imaging (MRI) and proton
magnetic resonance (MR) spectroscopic imaging of the brain. "These are non-invasive methods," explained Meyerhoff, "which allow taking a 'snapshot' of the structural and metabolic integrity of all parts of the brain. As opposed to computed tomograph...
Aquaporins - the perfect water filters of the cell
...ller ions be blocked? In particular, prevention of proton
(hydrogen ion) permeation is of crucial importance since a difference in proton
concentration (pH) between the cell interior and exterior is an important short-time energy storage ...
Monitoring epithelial plasticity, one cell at a time
...d cells. Intercalated cells of both types employ a proton
ATPase and an anion antiporter system to transport H+ and HCO3? ions across the epithelium. However, because they differ in the distribution of these proteins on their apical and basolateral surfaces, these two cell types affect plasma pH in opposing...
Pain in the gut? Don't blame stomach acid
... mice. Mice treated with prescription drugs called proton
pump inhibitors or PPIs, which block acid production, acquired more bacteria and developed more inflammatory changes in their stomach linings than untreated mice. "These animal studies indicate that it is the inflammatory response - triggering the o...
Excessive growth of bacteria may also be major cause of stomach ulcers
...ment of patients with potent acid blockers, called proton
pump inhibitors, which produce a more alkaline env... When the researchers treated normal mice with the proton
pump inhibitor omeprazole for two months, they noticed that these mice also developed stomach inflam...
Chemical evidence proves the old adage, Birds of a feather flock together
... 1 (the most common hydrogen isotope) only has one proton
and no neutrons, but a rarer form deuterium contains both a proton
and neutron. When Chamberlain and his co-workers analyzed warbler feathers collected at various U.S....
Scientists reveal fine detail of cell's energy machinery
...roton motive force' across the cell membrane. This proton
motive force drives the generation of ATP," said P...tructure of a respiratory enzyme that produces the proton
motive force by the "redox-loop mechanism" originally proposed by Peter Mitchell. "Forty years on, ...
A map of 'protein space' could predict structure, function
...which arranges the elements in order of increasing proton
numbers and places those with chemical similarities in the same columns. The table helped to predict elements that had not yet been discovered. "You assume there is some underlying principle to this process," Yona explains. "Proteins evolved and gen...
Molecular architecture and action of a proton pump
...s and nutrients. Hence, the proper function of the proton
pump is essential for survival of these organisms....regulated, as just published in Science. The yeast proton
pump is a member of the family of the so-called P-type ATPases. They are large membrane proteins whi...