Tag: "evolution" at biology news
UC Berkeley biologist disputes current dogma that genetic mutation is the cause of cancer
...row into a cancer. Such a scenario, not unlike the evolution
of a new species, explains the slow development of most cancers, Duesberg said. Natural evolution
of a new species also is based on chromosome number variation, he pointed out. Duesberg and his coll...
Scientists, research advocates honored as Albert B. Sabin Heroes of Science
...and hepatitis B, aswell overseeing the commercial evolution
of vaccines againstmeningococci and pneumococci . His measles vaccine alone isestimated to prevent one million deaths worldwide every year. HisMMR vaccine protects children against three different diseases -measles, mumps and rubella - and is now t...
Mouse genome revealing which DNA sequences activate human genes
...that code for genes across different species. "If evolution
conserved a sequence over the 70-90 million years since mice and humans diverged, it likely has a function," says Frazer. "Whether its function is to determine the structure of a protein coded for by a gene or to regulate gene expression, we should ...
Nearly identical controls of immune genes in mice and humans hint at new asthma treatment
...ciple to the non-gene portions of the genome. "If evolution
conserved a sequence over the 70 to90 million years since mice and humans diverged, it likely has a function," says geneticist Kelly Frazer, PhD, senior scientist at LBL's Life Sciences Division, senior author on the Science paper and co-author on th...
Researchers find unusual protein in bacterium
...gn of new antibiotics and provide insight into the evolution
of life, they say. The finding is described in the...ted it to do something different," says Kurtz. The evolution
of an oxygen-sensing protein was probably a matter of survival, he theorizes. Most scientists believ...
UCSF study reveals mechanism of telomerase enzyme that could lead to target for cancer therapy, cell regeneration
...ch as HIV -- represent an intermediate step in the evolution
of enzymes from strictly RNA sequences to strictly protein sequences, says Blackburn. "Such a direct function for the RNA structure in the enzymatic action of telomerase supports an evolutionary scheme in which RNA enzymes acquired protein componen...
Study contradicts assumption that ulcer bug has always plagued humans
...ssumed that humans acquired H. pylori during their evolution
from pre-human ancestors. "People haven't paid any attention to the possibility that human H. pylori infection might have become widespread only in more recent history," Berg says. His results are compatible with the idea that genetic difference...
DNA games: From computing to espionage
...niversity. In addition to her studies of molecular evolution
and the origin of our natural genetic code, Dr. Landweber is a pioneer in a field known colloquially as DNA computing. She will speak about how one can harness the information bearing capacity of DNA and other nucleic acids to compute; for example, c...
NYU biologist identifies gene that regulates how plant cells proliferate and organize to form root systems
...species provides a unique system to understand the evolution
of meristem organization both during embryogenesis and vegetative growth."...
Building better engines through natural selection
MADISON - Could Charles Darwin's rules of evolution
help engineers design high-performance engines of the future? Computer models developed at the University of Wisconsin-Madison are doing just that, by using genetic algorithms to simultaneously increase fuel efficiency and reduce pollution. Pete...
Healing the brain from the inside out
...f recent experiments has shaken. "Somewhere during evolution
it was believed," Macklis says, "our brain, unlike the brains of other lower vertebrates, decided it would no longer do self-repair. The assumption has been that because we as mammals build a very complex brain, we don't want to mess around with it. ...
Ancient fossil shows earliest feathers, may end argument about birds' origin
..." Rubin said. "So you have birds flying before the evolution
of the first bird-like dinosaurs. We now question very strongly whether there were any feathered dinosaurs at all. What have been called feathered dinosaurs were probably flightless birds."...
Ancient feathered animal challenges dinosaur-bird link
...rds, compel changes in widely accepted theories of evolution
and ruffle some feathers in museum exhibits around..." Ruben said. "So you have birds flying before the evolution
of the first birdlike dinosaurs. We now question very strongly whether there were any feathered dino...
Ancient math refines theories of evolution
...ry approach to addressing questions concerning the evolution
of important traits," says Paul Lewis, professor o...ory of life, allowing other questions, such as the evolution
of the genes of an organism, to be more accurately studied. "The Bayesian approach reduces the cha...
UI researcher validates underpinnings of scientific theory
...eague have confirmed that researchers studying the evolution
of ancient marine life, while overlooking much relevant data, have the record straight. That's important, according to Jonathan Adrain, assistant professor in the UI department of geoscience, and Stephen Westrop of the University of Oklahoma, becaus...
UCSF research reveals how the embryo brings its heart together
...s to have been used over and over again throughout evolution
for different roles: for cell proliferation, for wound healing, and now as we have found, for bringing the two parts of the primordial heart together." If it serves this role for the zebrafish heart, Stainier suggests, it probably performs the same...
Reefs and atolls of the Australian outback
...bon isotope values, and these can be traced to the evolution
of the atmosphere, the oceans and perhaps to life itself," said Dr Lemon. Oil and gas are known from similar, younger reef complexes around the world. "The Golden Lane atoll on the east coast of Mexico, and the Golden Spike reef in Alberta Canada ar...
The issue of teaching evolution
in schools has resurfaced in Kansas. The three inc...ed to change the science standards to de-emphasize evolution
theory. The three conservative Republicans were beaten by moderate Republicans who say they oppose ...
Study on chromosome ends may aid cancer research
...lomere regulation has been so important throughout evolution
that human cells employ many of the same mechanisms. "These are very lowly organisms. This is what we use to bake bread," she said. "However, as we show in this paper, humans have a protein very similar to yeast Pif1p. It would be quite gratifying if...
Microscopic bone evidence supports dinosaur-bird evolution link
...oks that show this," he said. The debate over bird evolution
grew more heated in June when a team of Russian and U.S. researchers suggested a fossil of a small flying reptile with feathers, called Longisquama, came from 225 million years ago. That's about the time dinosaurs first appeared but 75 million years ...
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