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Tag: "cut" at biology news

New Technique for Tracking Gene Regulators

...REB-bound fragments, they release the CREB andthen cut the DNA with a “restriction?enzyme that recognizes...g-fragments, or “tags,?ineach direction from these cut sites. This gives the scientists a largenumber of very short DNA “tag?sequences, which all have the ...

“Nano-scissors?laser shows precise surgical capability

... beauty of this laser, she says, is its ability to cut organelles(parts of cells—they are what organs are...asers usedin surgery heat the area to be cut, then cut it, but this heightens therisk for tissue damage.Ben-Yakar’s nanosurgery technique used a series of ...

Molecular machine may lead to new drugs to combat human diseases

... crystallized form of a molecular machine that can cut and paste genetic material is revealing possible n...trans-splicing in which introns are manipulated to cut out malfunctioning genes. Introns' unique capability of cutting and pasting apparently has been con...

Weill Cornell Research Reveals Secrets Of Trafficking Within Cells

...ogies -- RNA interference (RNAi), where scientists cut down on protein expression by jamming the responsible gene with bits of RNA; and microscopy, which looks at the activity of individual living cells by attaching a fluorescent tag to a specific cell component -- in this case clathrin. "This means tha...

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

... "Starting with the basic migrastatin molecule, we cut a piece there, add a piece here," he explained, "and what we ended up with were two compounds -- core macroketone and core macrolactam -- that are about 1,000 times more powerful at inhibiting cancer cell migration." In fact, in a mouse model, the a...

Researchers find missing genes of ancient organism

...se regions, termed introns, are sequences that are cut out of whole gene transcripts during the process of tRNA maturation. The known tRNA introns in organisms like yeast, however, appear to have no function. Therefore, modern tRNA introns might be remnants of an old essential process of tRNA biosynthesi...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

... marine-derived nutrients, and the foxes basically cut off the subsidies by interrupting the flow of nutrients coming from offshore," Croll said. "It transformed the plant community from one that does well in nutrient-rich conditions to one that does well in nutrient-depleted conditions." Foxes were fir...

Jumping gene helps explain immune system's abilities

...d in genetic material. "Jumping genes" essentially cut themselves out of the genetic material, and scient...rms a tiny loop.Unexpectedly, when Hermes is being cut out of the DNA, the leftover DNAalso forms a hairpin loop, temporarily doubling back on itself,postd...

UCSD Discovery Shows How Embryonic Stem Cells Perform 'Quality Control' Inspections

...d in genetic material. "Jumping genes" essentially cut themselves out of the genetic material, and scient...rms a tiny loop.Unexpectedly, when Hermes is being cut out of the DNA, the leftover DNAalso forms a hairpin loop, temporarily doubling back on itself,postd...

New therapy for HIV/AIDS eliminates needles and excessive toxicity

...d in genetic material. "Jumping genes" essentially cut themselves out of the genetic material, and scient...rms a tiny loop.Unexpectedly, when Hermes is being cut out of the DNA, the leftover DNAalso forms a hairpin loop, temporarily doubling back on itself,postd...

Gene sequencing explains bioremediation 'bug'

...d in genetic material. "Jumping genes" essentially cut themselves out of the genetic material, and scient...rms a tiny loop.Unexpectedly, when Hermes is being cut out of the DNA, the leftover DNAalso forms a hairpin loop, temporarily doubling back on itself,postd...

Circles Of DNA Might Help Predict Success Of Stem Cell Transplantation

... combinations. The rings represent sections of DNA cut out of chromosomes during the mixing and matching of genes that are chosen to build a particular receptor. Each T cell uses the resulting combination of genes to make a receptor that lets the cell recognize a specific target. When stimulated to multi...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...en fields. Riparian forests along rivers have been cut down or degraded which has led to increased erosion and sedimentation, and disruption of the local hydrologic pattern. This has made navigation difficult and also hindered waterfowl and fish migration." Local cattle raising in the Pantanal has decli...

Protein offers way to stop microscopic parasites in their tracks

...is to continue rotating, the glue spots have to be cut off at the back or they will jam the belt, greatly reducing the parasite's ability to move and thereby infect a host. A postdoctoral researcher in Sibley's lab, Fabien Brossier, Ph.D., decided to try to use the recently completed Toxoplasma genome t...

Measuring hormone cuts antibiotic use in half in pneumonia patients

... spent in the hospital. "We showed we were able to cut the number of days patients were on antibiotics in half, without compromising their outcome," Dr. Tamm said. ...

A little stress gives beneficial oomph! to immune system

...s immunologically following stress ?the skin isn't cut or wounded in some other way ?activated leukocytes usually return to their resting position in a few hours." Some of the mice in the study were restrained in clear plastic ventilated tubes for two-and-a-half hours. These mice ?the stressed group ?co...

Scientists discover that three overlapping signals in embryo help get the backbone right

...Siamese twin embryo," Khokha said. "The piece they cut out from the donor embryo and transplanted into th...gh all vertebrate evolution," Khokha said. "If you cut out a similar tissue and transplant it in a mouse, you also get the Siamese twin phenomenon. So, we ...

Confocal imaging promises early detection of skin cancer

...ents and producing a user-friendly design. “We can cut these costs by a factor of ten, resulting in a 20,000-euro machine that is affordable for many outpatient centres.?/p> Trials at two university hospitals ?in Regensburg, Germany, with experienced dermatologists, and in Brescia, Italy, with people...

Scientists discover how Ebola virus infects cells

...r enzymes that the Ebola virus co-opts and uses to cut up one of the virus' surface proteins. Once this protein is snipped apart, the virus is free to begin multiplying. The scientists applied broad-spectrum enzyme inhibitors to mammalian cells before exposing them to Ebola virus. When one specific cellu...

Low oxygen likely made Great Dying worse, greatly delayed recovery

... cases nearby populations of the same species were cut off from each other because even low-altitude passes had insufficient oxygen to allow animals to cross from one valley to the next. That population fragmentation likely increased the extinction rate and slowed recovery following the mass extinction, ...

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