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Tag: "skeleton" at biology news

Mutating the entire genome

...in the mutant mouse on the left, compared with the skeleton of a normal mouse on the right. The new method promises to speed efforts to learn more about how non-gene portions of DNA control genes to cause human defects and diseases. Credit: Sen Wu, University of Utah Genes account for only 2.5 percent of DNA...

Bones in motion: Brown scientists to create new 3-D X-ray system

...be able to see through skin and muscle and watch a skeleton move in 3-D," said Elizabeth Brainerd, the Brown University biology professor overseeing development of the new system. "Imagine animated X-ray movies of flying bats or flexing knees. It's very cool technology that is also very important from a biome...

Gut research yields new anti-cancer approach

...otubules, protein structures that form part of the skeleton of cells. Beyond providing structural support a...ample, "freezes" tubulin subunits, making the cell skeleton rigid and unable to make the shape changes necessary for cell division. Brought to the market by Bri...

Researcher to study astronaut bone loss for space biology agency

... will require that the structural integrity of the skeleton be maintained." Astronauts who spend weeks or months in the weightless environment of space –?a state called skeletal unloading –?lose bone because, in the absence of gravity, they lose the ability to make enough new bone cells to replace old cell...

Researchers urge monitoring of bone health during chemotherapy

.... student in Weilbaecher's lab. "Strengthening the skeleton would not only help prevent osteoporosis and fractures but also might give patients a survival advantage." In the laboratory mice studied, G-CSF increased the number and activity of bone cells called osteoclasts, which resorb bone material as part o...

Ancient ape ruled out of man's ancestral line

...ent layers, it is the most complete hominid fossil skeleton ever found. Little Foot is of the genus Austral...mediately above and below the body, they dated the skeleton at around 2.2 million years old. Their findings, published in the American journal Science, are c...

New dwarf buffalo discovered by chance in the Philippines

...and features of the new species based on a partial skeleton consisting of two teeth, two vertebrae, two upper arm bones, a foot bone, and two hoof bones. The fossil could not be dated with certainty, but the authors estimate that it probably lived during the Pleistocene ("Ice Age"), probably between 10,000 an...

A wolf in sheep's clothing: Plague bacteria reveal one of their virulence tricks

...ls' cytoskeletons, the mutant left the actin-based skeleton intact. Then, the researchers took it one step further. Stebbins and Prehna worked with collaborators at Stony Brook University, who created Yersinia bacteria with Prehna's mutations. The Stony Brook researchers then injected mice with the wild-type...

West Australian fossil find rewrites land mammal evolution

...estern Australia where it was found. The fossil skeleton shows the fish's skull had large holes for breathing through the top of the head but importantly also had muscular front fins with a well-formed humerus, ulna and radius the same bones are found in the human arm. "This new fossil proves that featu...

Corals switch skeleton material as seawater changes

... case of an animal altering the composition of its skeleton in response to change in its physical environment....an 2-to-1 began producing a large portion of their skeleton with the calcite mineral, while those grown in unmodified modern seawater produced exclusively the a...

Adult stem cells are touchy-feely, need environmental clues

...gainst surrounding objects. Each cell has its own skeleton and molecular motors that it uses as muscles. According to the researchers, the amount of force the stem cell needs to move its cellular muscles triggers an internal chemical signal that, in turn, directs the cell to differentiate. "The cytoskele...

Matrilin-3 gene discovered to prevent onset of osteoarthritis

...tilage together. Matrilin-1 and -3 are specific to skeleton tissues, while matrilin-2 and -4 are also found in other tissues throughout the body. There has been a link between mutated forms of matrilin-3 and hand osteoarthritis, as well as skeletal disorders such as multiple epiphyseal dysplasia (MED), a diso...

UF scientists reveal ancient origin of vertebrate skeleton

... scientists have found that people have an ancient skeleton in their closets - a skeleton personified today by a jawless, eel-like fish. It turns out lampreys, long thought to have taken a ...

UF scientists reveal ancient origin of vertebrate skeleton

... scientists have found that people have an ancient skeleton in their closets - a skeleton personified today by a jawless, eel-like fish. It turns out lampreys, long thought to have taken a ...

Forgotten by evolution?

...s CDO, the cells showed certain characteristics of skeleton muscle cells. In both experiments, a row of muscl... of the chromatin). In the differentiation toward skeleton musculature, the scientists indeed saw characteristic features of the skeletal muscle cells. It neve...

Scientists sequence DNA of woolly mammoth

... exceptionally well preserved remains of a mammoth skeleton in the permafrost soil of northern Siberia, in combination with a novel high-throughput sequencing technique that could cope with the heavily fragmented DNA retrieved from the organism's mandible, its jaws. The bone material used in this study is ap...

Newly discovered birdlike dinosaur is oldest raptor ever found in South America

...culated and nearly complete. An additional partial skeleton discovered on an earlier expedition led by Apestegua helped fill in missing bones. Since discovering the first two Buitreraptor fossils, the scientists have discovered at least two more in the same area during fieldwork conducted in January 2005. "A...

Skull study sheds light on dinosaur diversity

...o announced the discovery of a complete titanosaur skeleton in 2001, sauropod specialists finally can start piecing together a clearer picture of the dinosaurs' lives. One feature of the skulls is particularly intriguing. "They have elongate, sort of horse-like skulls with many openings and grooves on the o...

Study: Predatory dinosaurs had bird-like pulmonary system

...ventilation. This system also creates holes in the skeleton of birds, which has led to a popular notion that b...udy, which examined how the air system invades the skeleton in areas such as the neck, chest and hips, finds similarities between the vertebral column of dinosa...

Researchers identify new catfish family

...isen while dinosaurs roamed the Earth. The fish's skeleton was scanned by high-resolution computer tomographic equipment at The University of Texas at Austin. "To most people it's just a catfish, and externally it looks a lot like an ictalurid, the family to which all North American freshwater catfishes bel...

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