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Belugas were observed among West Greenland sea ice.

DNA breaks in nerve cells' ancestors cluster in specific genes

Recurrent DSB clusters in neural stem/progenitor cells are shown.The genome of developing brain cells harbors 27 clusters or hotspots where its DNA is much more likely to break in some places than others, researchers from the Program in...

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New imaging technique shows how DNA is protected at chromosomes' ends

A new imaging technique has allowed researchers at North Carolina State University, the University of North Carolina at Chapel Hill, and the University of Pittsburgh to see how DNA loops...

Unraveling the enigma of salty taste detection

Public health efforts to reduce dietary sodium intake have been hindered by an incomplete understanding of the complex process by which humans and other mammals detect salty taste.

Study finds fish larvae are better off in groups

Group of black axil chromis (<i>Chromis atripectoralis</i>) larvae swimming in the Great Barrier Reef.A recent study provides new evidence that larvae swim faster, straighter and more consistently in a common direction when together in a group. The research led by scientists at the...

Fish fins can sense touch

The pictus catfish can feel with its fins.The human fingertip is a finely tuned sensory machine, and even slight touches convey a great deal of information about our physical environment. It turns out, some fish use their...

Genetics help fish thrive in toxic environments, collaborative study finds

The Atlantic molly is able to survive in toxic hydrogen sulfide water because of genetic mechanisms, according to a collaborative study that involved a Kansas State University researcher.They live in caves and springs throughout Mexico and thrive in water so toxic that most forms of life die within minutes.

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Scientists propose 'pumpjack' mechanism for splitting and copying DNA

These are two images showing the structure of the helicase protein complex from above. (a) A surface-rendered three-dimensional electron density map as obtained by cryo-EM. (b) A computer-generated 'ribbon diagram' of the atomic model built based on the density map. The helicase has three major components: the Mcm2-7 hexamer ring in green, which encircles the DNA strand; the Cdc45 protein in magenta; and the GINS 4-protein complex in marine blue. Cdc45 and GINS recruit and tether other replisome components to the helicase, including the DNA polymerases that copy each strand of the DNA.New close-up images of the proteins that copy DNA inside the nucleus of a cell have led a team of scientists from the U.S. Department of Energy's Brookhaven National Laboratory,...

Wolf species have 'howling dialects'

This is a picture of North-western wolves howling at the Wolf Conservation Trust, UK.The largest ever study of howling in the 'canid' family of species -- which includes wolves, jackals and domestic dogs -- has shown that the various species and subspecies have...

Experts urge extreme caution on 'rewilding' to save wild places

European bison imported from Poland now roam Denmark's Baltic island of Bornholm in places where the animals haven't lived for thousands of years. Meanwhile, in a far corner of Siberia,...

Turning the volume of gene expression up and down

Artificial transcription factor activators and repressors of different strengths were introduced in the fruit fly embryo to regulate the expression of the rhomboid gene. Activators and repressors are able to tune gene expression like volume knobs in a radio. The computational model (graphs) was able to predict the experimental results. (Modified from <em>Nature Genetics</em>.)Gene expression can be turned on and off like a switch, or it can be finely adjusted , as with a volume control knob. Dr Garth Ilsley, research scientist in...

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New nanotechnology detects biomarkers of cancer

Researchers at Wake Forest Baptist Medical Center have developed a new technology to detect disease biomarkers in the form of nucleic acids, the building blocks of all living organisms.

NOAA, partners: Testing detects algal toxins in Alaska marine mammals

The locations of Alaska marine mammals that showed exposure to toxins from harmful algae. Letters on animal figures correspond to species list at right.Toxins from harmful algae are present in Alaskan marine food webs in high enough concentrations to be detected in marine mammals such as whales, walruses, sea lions, seals, porpoises and...

By switching 'bait,' IU biologists trick plants' bacterial defense into attacking virus

Two <em>Arabidopsis</em> plants that were used in the study. The left plant, infected by turnip mosaic virus modified with fluorescent jellyfish protein, glows greenish blue under ultraviolet light three weeks after infection in the lower left corner. The uninfected plant on the lower right glows purple due to chlorophyll in the green leaves.Scientists at Indiana University have modified a plant gene that normally fights bacterial infection to confer resistance to a virus.

Scientists learn how young brains form lifelong memories by studying worms' food choices

A segment of a <i>C. elegans</i> worm with a RIM neuron shown in green. The scientists showed that this neuron produces a learning signal that makes the newly hatched worm able to remember an olfactory experience for the rest of its life.Members of neuroscientist Cori Bargmann's lab spend quite a bit of their time watching worms move around. These tiny creatures, Caenorhabditis elegans, feed on soil bacteria, and their very lives...

How your cells build tiny 'train tracks' could shed light on human disease

Graphic of microtubules, the 'railway network' within every cell of the human bodyResearchers from the University of Warwick have discovered how cells in the human body build their own 'railway networks', throwing light on how diseases such as bowel cancer work. The...

Chemical cages: New technique advances synthetic biology

Living systems rely on a dizzying variety of chemical reactions essential to development and survival. Most of these involve a specialized class of protein molecules--the enzymes.

Tick tock -- sequencing the tick genome could help defuse the Lyme disease time bomb

Tick genome was decoded.The deer tick transmits Lyme disease and other diseases, which cause thousands of human and animal deaths annually. With about 10,000 new patients each year, occurrences of Lyme disease in...

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Rare bumble bee may be making a comeback in Pacific northwest

This is a <i>Bombus occidentalis</i> on a flower.Bombus occidentalis used to be the most common bumble bee species in the Pacific Northwest, but in the mid 1990s it became one of the rarest. Now, according to an...

Researchers create synthetic biopathway to turn agriculture waste into 'green' products

In the lab, researchers use engineered bacteria to brew green chemicals that can be used in a wide range of useful products.Researchers at the University of Minnesota have engineered a new synthetic biopathway that can more efficiently and cost-effectively turn agricultural waste, like corn stover and orange peels, into a variety...

Search technique helps researchers find DNA sequences in minutes rather than days

Database searches for DNA sequences that can take biologists and medical researchers days can now be completed in a matter of minutes, thanks to a new search method developed by...

Rice lab offers new strategies, tools for genome editing

A Cas9 protein (light blue) with guide RNA (purple) and DNA (red) shows a DNA bulge, marking a sequence that would be considered off-target for CRISPR-Cas9 editing. The Rice University lab of bioengineer Gang Bao has developed Web-based tools to search for such off-targets.Rice University bioengineers have found new techniques for precision genome editing that are more accurate and have fewer off-target errors.

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