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Tag: "mammals" at biology news

Mammalian Transcriptome Mapped

... says Wahlestedt, the transcriptional landscape of mammals shows this same principle may be used by nature on a massive scale to extensively modulate the gene expression within in our cells. It's still unclear whether the majority of antisense sequences are involved in regulation or in some other biology, h...

New amphibian species result from exploration, not from rule changes

...entirely clear, declining more rapidly than either mammals or birds, underscoring the importance of an accurate evaluation. An analysis published in the August 2005 issue of BioScience, the monthly journal of the American Institute of Biological Sciences, indicates that, contrary to some published expert op...

New insights into the software of life

... genes. "In simple terms, the data shows that in mammals each individual gene uses multiple different mechanisms to produce different forms of protein. In a sense, each 'gene' is actually multiple different genes," Professor Hume explained. The second of the papers in Science deals extensively with anoth...

Mouse genome much more complex than expected

...eral conclusion of the study is that the genome of mammals is much more complex than was hitherto supposed. ...bservation might also explain the big question why mammals only have about twice as many genes as threadworms, which have a much simpler structure. 'Our study ...

New technique multiplies life span in simple organisms

...lts are not included in the Cell paper. Since all mammals share key aging-related genes, the paper points to...ssful with simple organisms," he said. "Naturally, mammals are complex, and it will be a great challenge to get major life-span extension." A "really exciting...

Molecular research suggest shift needed in how some drugs are created

... signaling molecule involved in immune response in mammals suggests that researchers "should rethink what they are doing" in creating drugs based on a fruit-fly model, scientists say. Reporting in the Oct. 1 issue of the Journal of Immunology, researchers at the University of Illinois at Urbana-Champaign un...

Olfactory system detects pheromones that control reproduction

...havior in rodents, this requires us to rethink how mammals detect pheromones. It is quite tempting to speculate that there might be such a circuit in humans," said Dulac. "We must also rethink the simplistic division of olfaction, in which the main olfactory system governs cognitively based behavior and the ...

A resetting signal keeps circadian rhythm on track in Drosophila fruit flies

...nvestigator. "However, circadian brain anatomy in mammals is much more complicated and the tools much too primitive to allow a similar network approach at this time. Flies are state-of-the art. Fortunately, their circadian clocks and even neural mechanisms are quite conserved with mammals." "We were curi...

What can change in the brain? Electrical synapses, research shows

...ich Connors' group discovered in the forebrains of mammals six years ago. The function and importance of these protein channels - which allow for lightening-quick signals to pass between neurons via ionic current - is only beginning to be understood. Last year, the Connors lab published research showing that...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...ds can once again feast on the carcasses of marine mammals as their ancestors did centuries ago. The researc...on marine species, the rest on a mixture of marine mammals and giant land mammals. "When the Ice Age ended, most of the terrestrial megafauna vanished," Cham...

Scientists fetch useful information from dog genome publications

...re abundant mobile DNA elements that are common in mammals and have contributed extensively to genome evolution. In their publication, Drs. Wei Wang and Ewen Kirkness, scientists at The Institute for Genomic Research, report the identification of more than 10,000 SINE insertions in the canine genome and des...

Dog genome sequenced

...re abundant mobile DNA elements that are common in mammals and have contributed extensively to genome evolution. In their publication, Drs. Wei Wang and Ewen Kirkness, scientists at The Institute for Genomic Research, report the identification of more than 10,000 SINE insertions in the canine genome and des...

Drunken elephants: The marula fruit myth

...ts accessing stores of wine or beer, the three-ton mammals clearly have a taste for alcohol. They also have a demonstrated fondness for marula fruit, gathering around trees when the fruit is in season. Fallen marula fruit may naturally ferment to an ethanol content of approximately 3 percent after three or f...

Marsupial genome reveals insights into mammalian evolution

...has allowed us to deduce what the MHC of ancestral mammals looked like," says Belov. "We think it contained ...riods of time. The monotremes split off from other mammals 210 million years ago. The remaining marsupials split from the main (placental) group about 180 yea...

UCSD study finds anthrax toxins also harmful to fruit flies

...s that allow anthrax to cause disease and death in mammals have similar toxic effects in fruit flies, accordi...imple question of whether anthrax toxins affecting mammals could act on the fly counterparts of proteins affected in humans, and the answer is yes," said Ethan...

Computers to save unique type of American red squirrel

...e Mexican Spotted Owl and the Northern goshawk and mammals like the Bobcat. Dr Peter Lurz, a research associate based at Newcastle University's Institute for Research on Environment and Sustainability, began working on the project when the Arizona University team attended an international squirrel symposiu...

'Banana-jawed' fossil mammal linked to rare sound-producing skill

...yohyrax and its fossil relatives would be the only mammals found so far to use such a skeletal structure for ... said. "Hyraxes today are improbably cute-looking mammals that are about the size of rabbits, look much like guinea pigs and have a penchant for sunbathing," ...

Hyena mothers give their cubs a helpful dose of hormones

...he April 27 issue of Nature, is the first study in mammals to demonstrate a relationship between a female's social rank and her ability to influence her offspring's behavior through prenatal hormone transfer. Previously, this phenomenon had only been documented in birds. Michigan State University's Kay Hole...

Duck-billed dino crests not linked to sense of smell

...dentally, that's where it is in birds, crocodiles, mammals and basically all four-legged animals." Evans studied fossils from a group of herbivorous dinosaurs called lambeosaurs, which are often referred to as crested duck-billed dinosaurs. Lambeosaurs are easily recognizable for their large cranial crests,...

Marine mammals are on the frontline of failing ocean health

...mals, with implications for human health. "Marine mammals are providing early clues of our unseen impact on ...ith bone and renal disease) is higher in organs of mammals with invertebrate-based diets. "The issue is to understand how pollutants are transferred throu...

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