17 Articles with the topic: Structural Biology
Rebellious Teen? A Brain Area May Hold the Key
sea-maid submitted, created time 6 months 1 day (abcnews.go.com)
Child development experts are scrutinizing a new study that suggests the size of small, almond-shaped structures in the center of the brain known as the amygdalae may hold the key to how aggressive teens behave toward their parents. But researchers at the University of Melbourne's Orygen Research Center in Australia report that these areas of the brain may have a special link when it comes to teens who regularly fight with their parents. 
Amputee runner back in the game, but are the data sound?
Darkfrog submitted, created time 5 months 4 weeks (sciencenow.sciencemag.org)
The fastest man on no legs has been un-disqualified from the Olympics. Oscar Pistorius, who runs on two prosthetic feet called Cheetahs, had been barred from inclusion in the Olympics because a team of scientists hired by the International Association of Athletics Federations ruled that his prostheses gave him an unfair advantage. A new study, performed at Mr. Pistorius's request, shows otherwise.
This article, unlike some of the more human-interest ones I've read, really delves into the studies themselves, how they were performed and what may have been wrong with them
Feisty frog uses a move straight from the comic books
Darkfrog submitted, created time 5 months 3 weeks (sciencenow.sciencemag.org)
I've said it before; I'll say it again: You would NEVER see this in Nature. In a writeup by Lauren Cahoon, Science compares a rare frog behavior to characters from Marvel Comics.
Science reports that certain African frogs of the Arthroleptidae variety have a very interesting way of repelling attackers. Researchers who picked up live frogs often found themselves scratched and bleeding, as if cut by claws ...which frogs don't have
It’s All About Geometry: Protein Contact Surfaces Hold Key to Cures
jane2007 submitted, created time 9 months 2 weeks (ucsdnews.ucsd.edu)
For scientists seeking new treatments for diseases like Parkinson’s and Alzheimer’s, geometry is very important. In the atomic-level landscape of proteins, shape determines the all-important function of these molecules of life.
Codon evolution is governed by linear formulas.
sorimachi submitted, created time 9 months 1 week (www.springerlink.com)
A new discavery that codon evolution is governed by linear formulas based on simple calculations of a lot of genomic data. This study has been dirived from the evidence that a gene assembly coding 3,000-7,000 amino acid residues represents the whole genome (Mycoscience 44(5): 415-417, 2003); genome is constructed homogeneously with putative small units coding similar amino acid compositions.
Archaeological discovery elucidates misconceptions about domestication
Darkfrog submitted, created time 7 months 3 weeks (www.nytimes.com)
A discovery of ten donkey skeletons at a dig in Abydos reveals that the Egyptians didn't always view asses as a bumbling, low-rent form of transportation. The donkeys' skeletons show clear signs of wear and tear from freight work, but their hooves and teeth seem to indicate that they were cared for scrupulously and their general bone structure is almost identical to that of the wild ass. More significantly, the position of the burial site -- diggers initially expected to find human officials killed to accompany their king into the afterlife -- suggests a great deal of reverence
Fossilized jaw shows that hominids lived in Europe earlier than we'd thought
Darkfrog submitted, created time 7 months 3 weeks (www.nature.com)
The article names the single-find specie "Homo antecessor" and hypothesizes descent from Homo erectus, saying that some Homo e left Africa for Asia, then quickly doubled back to Spain.
This changes the system of ideas surrounding genus Homo's entrance into Europe. Previous fossils gave a date of as early as 800,000 years ago, but this mandible dates to 1.2 million.
Metabolism indeed varies between populations
Sue Wu submitted, created time 7 months 1 hour (www.nature.com)
Thousands of frozen urine samples have yielded new information about the diversity of human metabolism across the globe — about who eats what, and how their unique internal microorganisms handle the input.
Study says eyes evolved for X-Ray vision
sea-maid submitted, created time 2 months 2 weeks (esciencenews.com)
The advantage of using two eyes to see the world around us has long been associated solely with our capacity to see in 3-D. Now, a new study from a scientist at Rensselaer Polytechnic Institute has uncovered a truly eye-opening advantage to binocular vision: our ability to see through things. Most animals — fish, insects, reptiles, birds, rabbits, and horses, for example — exist in non-cluttered environments like fields or plains, and they have eyes located on either side of their head
How women bend over backwards for baby
jane2007 submitted, created time 11 months 1 week (www.nature.com)
Researchers have found that the vertebrae that make up a woman’s spine have evolved to give her more support, probably to help her cope during pregnancy. The results hold true for modern mothers as well as those of their ancient ancestors, Australopithecus, who lived more than two million years ago. Vertebrae in men lack these features.
Darkfrog submitted, created time 10 months 6 days (www.nytimes.com)
The fastest man on no legs, South African double amputee Oscar Pistorius has been declined for inclusion in the 2008 Olympic games -- because his prosthetic legs, officials claim, give him an unfair advantage.
NY Times is being tricky again. Here's the URL: (http://www.nytimes.com/2008/01/14/sports/othersports/14cnd-pistorius
Structure of the RNA-Binding Domain of Telomerase: Implications for RNA Recognition and Binding
salut8 submitted, created time 11 months 1 week (www.structure.org)
“Telomerase, a ribonucleoprotein complex, replicates the linear ends of eukaryotic chromosomes, thus taking care of the ‘end of replication problem’. TERT contains an essential and universally conserved domain (TRBD) that makes extensive contacts with the RNA (TER) component of the holoenzyme, and this interaction is thought to facilitate TERT/TER assembly and repeat-addition processivity. Here, Susan et al. present a high-resolution structure of TRBD from Tetrahymena thermophila. The nearly all-helical structure comprises a nucleic acid-binding fold suitable for TER binding
Evolution cause Mom in a Full, Upright Position
Eric wu submitted, created time 11 months 1 week (sciencenow.sciencemag.org)
Gravity is not kind to the pregnant woman. With 7-plus kilograms added to her tummy, a soon-to-be mother must stretch her lower back to balance the bulge. Now, a study suggests that women's spines evolved to help them carry the extra weight. The findings show how the need to reproduce can drive evolution, say the authors, but some scientists argue that the changes in the spine stem from an already well-explained phenomenon.
sumsung submitted, created time 7 months 4 weeks (sciencenow.sciencemag.org)
Despite their famous sticky toes, geckos sometimes take a tumble--and that's when a tail comes in handy. A new biomechanical study shows how geckos use their tails for extra control when they slip or fall. It even helps them glide through the air.
Organic materials discovered in outer space
Eric wu submitted, created time 7 months 3 weeks (sciencenow.sciencemag.org)
Radio astronomers have found the first evidence of an amino acid-like molecule in outer space, floating in a dust cloud 25,000 light-years away. Although the discovery doesn't prove that complex organic structures originated in space, it does present strong evidence that the basic ingredients for living organisms exist elsewhere in the galaxy--and that they could be seeding many young planets with life's building blocks.
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