Tag: "tail" at biology news
Scientists design molecules that mimic nanostructure of bone
...ike spokes on a wheel, with the hydrophobic greasy tail
directed to the center, leaving the peptide to face the exterior aqueous environment. This basic structure is repeated so that a long nanofiber is formed, like an insulated copper wire where the insulation is the peptide and the wire the alkyl group....
Protein discovery tied to DNA master switch
...o lysine, one of the amino acids that comprise the tail
domain of the histone molecules. Why lysine? Bec...tion of a particular lysine site (lysine 9) on the tail
of the histone H3. As it turns out, modifications of amino acids by methylation mainly occur on lys...
Crayfish robots on Mars
...at achieve propulsion by whole body undulations or tail
flapping and robots that walk using multiple joint...sting implications for future robotic design. "The tail
of the Yabby acts like a hinged lever, changing form to act as a sail for steering or a powerful pad...
Study reveals new information on how viruses enter cells
..., which carries the virus' genetic material, and a tail
made up of a hexagonal baseplate and six leg-type ...nd sending signals to and from the virus' head and tail
fibers. While transmitting its messages, the baseplate also prepares the virus machinery to ejec...
New understanding of complex virus nano-machine for cell puncturing and DNA delivery
..., the E. coli. The baseplate portion of the virus tail
is essential in this process," says lead researche...ses. It is also a "tailed virus" because it has a tail
with fibers that are used to grip its host. The tailed viruses are very common; up to one billion p...
An animal study raises additional concerns about the use of dexamethasone on premature infants
...ss. On PD 33, blood sampling was performed via the tail
nick method at 15, 30, 60, and 120 min following exposure to the preference box, with a basal time point obtained before the procedure. Brain weights. Brain weights were obtained during necropsy on PD 8, 23, and 35. Body weight, length, rate of grow...
New light on molecular switch that turns genes off
...residues, one of the amino acids that comprise the tail
region of histone molecules. Recent research at U...ethylation of particular lysines on the amino acid tail
of the histone H3 molecule. "The identity of any enzyme responsible for this modification was unkno...
UNC geologist, students to unveil 221 million-year-old top N.C. fossil
...ature called Aetosarus that had a pointed nose and tail
and looked like a little streamlined armadillo. Beneath the larger animal were remains of still another crocodile-like reptile known as a sphenosuchian. That creature, now being studied in Canada, walked on long, spindly legs like a dogs. We found i...
Bronx Zoo feathers help save rare birds half a world away
...oos throughout North America. It wasnt money, but tail
feathers shed from captive hornbills. The feathers will be shipped to Sarawak tomorrow, where officials will distribute them to indigenous people for use in traditional headdresses and ceremonies. This will offset the need to hunt rhinoceros and hel...
Experiments reveal ancient blood flow map
...ghout the body, but never reached the posterior or tail
section. Instead, blood cells clumped together at the entry point into the tail
region. The researchers concluded that without a functioning VEGF receptor, the blood cells could no...
Diabetes tied to altering of the heart's circadian clock
...Diabetes was induced into 61 male rats by a single tail
vein injection of the toxin streptozotocin. Sixty-two control animals were injected with saline only. Four weeks after initial saline or STZ injection, two control and two diabetic animals were sacrificed at specific time points, over three days, t...
Potential of regenerative medicine explored
...of such polymers at minute concentrations into the tail
veins of experimental rats, which were then subjected to atmospheric pressure corresponding to an altitude of more than 25,000 feet. Control animals that had been injected with the same volume of saline solution were observed for comparison. While 40...
U. Va. scientists find new piece of gene expression puzzle
...at the fourth (K4) and ninth (K9) positions on the tail
of one of the histones, H3, and revealed that when...l group called ubiquitin, which is attached on the tail
of a completely different histone, H2B, affected methylation of lysine at this K4 position on the H3...
Scientists at the Scripps Research Institute design gene-tipped tumor regressor 'smartbombs'
...n fluorescent protein, proteins that glow like the tail
of a firefly. These reporter genes allowed dramatic demonstrations of the specific targeting of the nanoparticles to tumors. (The tumors glowed green under a microscope). Cheresh and his colleagues then combined the nanoparticle with the mutant Raf ...
New method of DNA testing promises to transform medical diagnostics
...that happens, the little light attached to the PNA tail
goes on, and the test is positive for whatever DNA...The little florescent molecule attached to the PNA tail
is designed to absorb the blue light from the conjugated polymer and re-emit lower frequency green l...
U of C researcher tracks path of flying snake
...lating through the air as if swimming, moving the tail
up and down and side to side. From a 33-foot-height, they can glide as much as 70 feet across, make turns upto 90 degrees and always seem to land without injury. The Nature article is part of a larger research project Socha has been conducting as par...
Why the hammerhead shark's head is in the shape it's in
...rate searching behavior (as indicated by increased tail
beat frequency, increased frequency of turning and...uld become unresponsive (as indicated by decreased tail
beat frequency, decreased frequency of turning and swimming throughout the water column) after a cou...
Male birds' ability to learn song affects female mating response
...ludes a shivering of the wings, the lifting of the tail
and a characteristic call. As a control, the scientists exposed the wild-caught females to what the scientists had judged as well-learned male songs, as well as the digitally recorded wild songs. The female birds responded equally to both. However,...
Tiny, magnetic spheres may help overcome gene therapy hurdle
...am injected the virus-coated microspheres into the tail
veins of three mice and the free virus into the tail
veins of three others. They monitored what happened by tracking "marker" proteins produced by the vi...
DNA unzipping found to take at least two proteins, not one alone
...A single helicase can move along the single-strand tail
of a DNA, but once it hits the junction of the one-way and two-way streets, it cannot go any further. It will disassociate at the junction unless you have another coming in to bind to it." Ha and colleagues studied the helicases found in E-coli. Th...
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