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Tag: "propose" at biology news

Microbe fixes nitrogen at a blistering 92 C

...ics in terms of gene sequence, Baross says. "We propose that among diazotrophic archaea, the nitrogenase from FS406-22 might have retained the most ancient characteristics, possibly derived from a nitrogenase present in the last common ancestor of modern life," the co-authors conclude in their report. ...

A simple feedback resistor switch keeps latent HIV from awakening

...nal PLoS Biology, Leor Weinberger and Thomas Shenk propose that some animal viruses, including HIV, regulate ...eacetylated to turn off transcription. The authors propose this requirement may avoid making the off state so easy to reach that the virus remains dormant all ...

Protowings may have helped bird ancestors cover rough terrain

...effective for climbing slopes. Dial and colleagues propose that incipiently feathered forelimbs of bipedal protobirds may have provided the same advantages for incline running as have now been demonstrated in living juvenile birds. Their work thus supports a new theory about the evolution of flight in birds....

Genetic 'roadmap' charts links between drugs and human disease

...s such as cancer. Based on the results, the papers propose a public project to expand this initial human Connectivity Map -- in the spirit of the Human Genome Project -- to accelerate the search for new drugs to treat disease. "The Connectivity Map works much like a Google search to discover connections am...

Gene therapy accelerates healing of damaged skeletal muscle

...fied three main ways that such injuries occur, and propose strategies to prevent them. In a related commentary, Day discusses the importance of these findings and reviews the response to child farm injury in his country, Australia. ...

Gene therapy protects mice from the effects of whole-body irradiation

...fied three main ways that such injuries occur, and propose strategies to prevent them. In a related commentary, Day discusses the importance of these findings and reviews the response to child farm injury in his country, Australia. ...

Farm kids almost twice as likely to die from injury as children overall

...fied three main ways that such injuries occur, and propose strategies to prevent them. In a related commentary, Day discusses the importance of these findings and reviews the response to child farm injury in his country, Australia. ...

Nanosecond-scale release of stinging jellyfish nematocysts

...te the cuticle of crustacean prey. The researchers propose that the high speed of discharge is caused by the release of energy stored in the stretched configuration of the collagen-polymer of the nematocyst capsule wall. This ingenious solution allows the cellular process of vesicle exocytosis to release kin...

Researchers attack tumor cells by exploiting dependency on sugar metabolism

...s a critical role in tumor growth. The researchers propose that inhibition of LDH-A may represent a rational and safe strategy for treatment of cancer. "Because individuals with complete hereditary deficiency of LDH-A do not show any symptoms under ordinary circumstances, the genetic data suggest that inhibi...

Vampire bats recognise their prey's breathing

...y over several nights and the authors of the study propose that the bats use breathing sounds to identify their prey in the same way as humans use voice to recognise each other. In a study conducted by Udo Groeger and Lutz Wiegrebe from the Ludwig-Maximilians-Universitaet in Munich, Germany, two vampire bat...

Ancient global warming drove early primates' dispersal

...ously proposed scenarios was likely. Instead, they propose that Teilhardina migrated from South Asia to Europe, crossing the Turgai Straits---an ancient seaway between Europe and Asia---and then spread to North America by way of Greenland. The whole dispersal event happened within about 25,000 years. "I...

Newly identified protein complex sheds light on axon growth mechanism

...les along growing axons. Hengartner and colleagues propose that the UNC-69/UNC-76 complex may be implicated in vesicle trafficking, a process that is necessary for axon growth and new synapse formation. The short coiled-coil domain-containing protein UNC-69 cooperates with UNC-76 to regulate axonal outgrowt...

Role of protein in immune response may aid HIV research

...y, Roman Dziarski, Ph.D., and Dipika Gupta, Ph.D., propose that the proteins might be used to develop medications that could boost the body's impaired day-to-day response to bacteria in HIV/AIDS patients and others with compromised immune responses. The scientists announced discovery of the protein called PG...

Scientists uncover rules for gene amplification

...t can be extended to higher eukaryotes then we can propose that if the oncogene is located between the hairpin-capped break and the telomere, then the amplification event will result in a double minute. If the break occurs between the oncogene and the telomere, then the amplification would yield a homogenous...

Nanopore method could revolutionize genome sequencing

...an current methods. "The DNA sequencing method we propose has the potential of having fewer errors than the present method, which is based on the Sanger method," said Johan Lagerqvist, a graduate student in physics at UCSD and the lead author on the paper. "It should be possible to sequence strands of DNA ...

Possible brain hormone may unlock mystery of hibernation

... be clarified, the current observations lead us to propose the involvement of the protein complex in the regu...he brain's capacity for dormancy. The researchers propose that HPc in the blood is actively transported into the spinal fluid in response to the animals' natu...

Relationship of brain and skull more than just packaging

... physical change observed in the fossil record and propose hypotheses about the evolution of the genetic traits responsible for these changes. The researchers propose that the genetic basis of the complex regulatory sequences that cause the changes documented in cran...

Lizard 'third eye' sheds light on evolution of color vision

...impler organisms like the scallop, the researchers propose that the lizard's parietal eye photoreceptor cells represent a "missing link" between the light-sensing apparatus in lower animals and ours. It turns out that some frogs and fish also have a spot on their foreheads that might play the role of a lig...

Watching the brain switch off 'self'

...ocessing. As a result, wrote the researchers, "We propose that the role of self-related cortex is not in enabling perceptual awareness, but rather in allowing the individual to reflect upon sensory experiences, to judge their possible significance to the self, and, not less importantly for consciousness res...

Screening blood for West Nile virus

...for blood recipients. Korves and colleagues also propose and analyse an interesting alternative scenario: It turns out that one way to reduce costs dramatically and keep the risk of serious disease in blood recipients low would be to create a separate pool of blood reserved for those with a weakened immune...

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