How cells change the pace of their steps
...s that add and remove adhesion points at strategic positions on the outer membrane. Regardless of their size or shape, cells use what cell biologists call the cell motility cycle to take one step per cycle: first, the cell extends its leading margin over the substratum forming a pseudopod or foot-like extensio...Scientists discover new way to study nanostructures
...ing transition temperature from below, while their positions do not change. These observations, exhaustive qualitative and quantitative agreement between experimental measurements and theoretical predictions confirm that vibrational motions of the nanowire atoms are indeed the cause for the newly observed cond...Fruit fly gene from 'out of nowhere' is discovered
...h of these exons may serve as alternative starting positions for the gene to become activated. The researchers found that most of these exons had a sequence for a transposable element sitting right next to it. Duplicated sequences generated by transposons may be part of the mechanism for creating new genes, as......lls, or neurons, form and migrate to their correct positions during early brain development. In the current work, the MIT researchers looked at how Cdk5 affects the ability to form and eliminate fear-related memories. "Remarkably, inhibiting Cdk5 facilitated extinction of learned fear in mice. This data poin...Modern brains have an ancient core
... Not only were both cell types located at the same positions in the developing brains of the two species, but they also looked similar and shared the same molecular makeup. One of these cell types secretes vasotocin, a hormone controlling reproduction and water balance of the body, the other secretes a hormone...Fruit bats are not 'blind as a bat'
...foxes don't sleep all day; they often change their positions in the tree and interact with their neighbours. Young flying foxes also make training flights during the day. All these daytime activities require visual capabilities", says Brigitte Mueller. In contrast, Rousettus roosts in caves, and Epomophorus in...New findings challenge established views about human genome
...RNA transcript can be cut at two or more different positions to make different products, is very common in humans. It is unlikely, however, that alternative splicing adds substantially to the variety of functions and structures among proteins. Over the next couple of years the ENCODE project will be scaled u...Scientists decode RNA mystery, will help aim drug therapies
...a-tRNAs to pair up with messenger RNA at all three positions to create three sets of base pairs. This serves as the signal to tell the ribosome to use that aa-tRNA. In contrast, that potential can never exist between mRNAs and non-cognate aa-tRNAs. There are drugs that can fool the ribosome into misreading a...Agonized death throes probable cause of open-mouthed, head-back pose of many dino fossils
...t least partly explained on the basis of the death positions of many of their fossil vertebrates," the authors write in their Paleobiology paper. ...Some forest birds can survive in agricultural countryside with limited habitat conservation
...ng and radio-tracking system to monitor the birds' positions throughout the day. First, they hung mist nets in various places in the coffee plantations to catch a large sample size of birds of three particular species. Then, they tagged each bird with two colored leg bands and an aluminum ring with an identi...Left-right wiring determined by neural communication in the embryonic worm
... right or left -- appears to be random, with their positions reversed about 50 percent of the time. "What makes this an interesting puzzle to solve is understanding how the left and the right side become different from each other, and how they coordinate their activity so that every worm still has exactly one ...'Might have been' key in evaluating behavior
...ifying real neural signals to fictive outcomes now positions us to understand how our more abstract thoughts the way we contextualize or frame our experience guide our behavior." ...5 Stanford professors elected to National Academy of Sciences
...ion of civil war violence. Laitin has held several positions in the American Political Science Association and currently is a member of its task force on terror and violence. In 1995, he was elected to the American Academy of Arts and Sciences. Laitin has been a Howard Fellow, a Guggenheim Fellow and a fellow...National Academy of Sciences elects 2 Rutgers professors
...quences. In maize, he found the "islands" shifting positions along or between chromosomes, remaining intact and functional in the process. With chromosomal exchanges limited to the sequences between gene-coding regions, Dooner found that genes remain unscathed in different neighborhoods. The result is function...Alzheimer's, Parkinson's, type 2 diabetes similar at molecular level
...ommon features among them. "It is clear from the positions of the atoms where the zipper is," Sawaya added. "Like pieces in a jigsaw puzzle, they have to fit together just right. We are finding out how they fit together. We dont yet know all the ways of forming the zippers; we are working to fill in the miss...Susceptibility to Crohn's disease -- an important new clue
... the detection of novel susceptibility loci fixed positions on a chromosome, such as the position of a gene. Libioulle and colleagues applied this approach to Crohns disease and identified the key locus on chromosome 5. Individual susceptibility to many common diseases, including Crohns disease, is determin...New way to catch cancer's spread, rapid 3-D retinal imaging, more at CLEO/QELS 2007
...cally controlled electric fields to manipulate the positions of tiny nanorods, or nanowires (100 nm in diameter and 1-50 microns long). Ohta says that the optoelectronic device will possibly be used to place nanorods for the sake of building 3-D circuitry or for positioning oblong-shaped cells or cell protrusi...York mathematician probes geometric route to combat viruses
...ck to expand her group and fund three postdoctoral positions and four PhD students. The group will collaborate closely with the Astbury Centre in Leeds, and they will jointly organise a workshop on Mathematical Virology at the International Centre for Mathematical Sciences in August 2007. Dr Twarocks group ...Scientists reveal structure of gateways to gene control
...romoter control centers occupy several overlapping positions on the DNA molecule, typically 10 base pairs apart... DNA double helix. "It is striking how well these positions match with the architecture of the DNA as it wraps around the nucleosome's protein core," Pugh said....Pezcoller Foundation-AACR International Award for Cancer Research recognizes Mina J. Bissell
...sor to the Laboratory Director on Biology in 2002, positions she currently holds. Bissell also serves as a member of the faculty of three graduate groups at the University of California, Berkeley, and a member of Cancer Center at UCSF. She has received numerous recognitions and awards for her scientific ac...