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Tag: "job" at biology news

Ring-around-the-cell

...in unprecedented detail how the roving cells whose job is to digest bone seal off their work area as they get down to business. The cells, called osteoclasts, have some unique features not seen in any other cell type. Osteoclasts move around the bone until they reach a site where they sense that their s...

Syphilis rate on rise in US gay, bisexual men

...t" by talk about how medications are doing a great job of keeping AIDS patients alive. "We’ve been seduced by these amazing drugs and we’ve fallen behind in our prevention efforts," Ghanem said. "We have to get back on track with prevention messages. That’s the only way we will curb this outbreak." ...

UCLA: How does your brain respond when you think about gambling or taking risks?

Should you leave your comfortable job for one that pays better but is less secure? Should you have a surgery that is likely to extend your life but poses some risk that you will not survive the operation? Should you invest in a risky startup company whose stock may soar even though you c...

New clues to how sex evolves

...thods for these critical steps; in C. elegans, the job is initiated by regions called Pairing Centers, which are found near one end of each of the worm's six chromosome. Dernburg's lab has been studying the role of these special regions. Last year Dernburg, Phillips, and their colleagues identified t...

Rearing an army to save wheat

...orts are being completed by Frazier. It became her job to tend the cages of parasitic wasps every few day...hem available at a known location, we could do our job much more efficiently."...

Gene-bender proteins may sway to DNA

...s that make us who we are. Certain proteins do the job of regulating gene expression by clasping onto key spots of DNA -- the nucleic acid that contains the genetic instructions. How does the protein recognize a particular binding site" Structural changes in both the protein and DNA, sometimes with the ...

Firefighters face increased risk for certain cancers

...irefighters have used in the past didn't do a good job in protecting them against cancer-causing agents t... chemical exposures firefighters experience on the job and their increased risk for cancer," says LeMasters, professor of epidemiology and biostatistics at...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

... genome already sequenced, making that part of the job much easier. The second species, Drosophila simulans, was still in the process of being sequenced, which meant much of the work had to be done by hand by Masly and his collaborators. Masly knew that chromosome #4 on melanogaster held a gene that was...

Key gene controlling kidney development found

...zed) cell develops characteristics specific to its job in the body. The kidney stem cells, called mesenchymal blastemal cells, are the source of cells triggered by chemical signals to differentiate into nephrons--the structures in the kidney that cleanse the blood of waste. The nephrons later become att...

Novel regulatory mechanism identified for key tumor suppressor p53

...hat would have the effect of freeing p53 to do its job of suppressing cancer. Unusually high levels of the newly identified enzyme might also be useful as a diagnostic marker for cancer." Responsible for tumor suppression throughout the body, the p53 protein has been found to be mutated and dysfunction...

Biologists probe the machinery of cellular protein factories

...nstructions for making those proteins. The crucial job of reading the genetic instructions and synthesizing the specified proteins is carried out by ribosomes, tiny protein factories humming away inside the cells of all living things. Harry Noller, the Sinsheimer Professor of Molecular Biology at the U...

Scientists get best look ever at water-life connection

...y -- water has to move 100 times slower to get the job done. "The fast-moving water has to slow down to connect with a slow-moving protein -- it's that simple," Zhong said. "It sounds trivial, I know. But it should be trivial. "It's an essential biological interaction that has to work just right every...

Honey bee genome holds clues to social behavior

...e bees will switch jobs and become foragers. The job transition, whether triggered by age or social cues, involves changes in thousands of genes in the honey bee brain; some genes turn on, while others turn off. Genes are switched on and off by short strings of DNA that lie close to the gene. The str...

New finding points way to foiling anthrax's tricks

...h why the bacteria need two siderophores to do the job has been an enigma. The new study shows why anthrax bacteria require two siderophores working by two different mechanisms. Siderocalin, the human immune protein, binds bacillibactin and effectively sidelines it, the researchers found. Apparently, ...

Ozone recovering, but unlikely to stabilize at pre-1980 levels, says study

...d how the growth-boosting hormone accomplishes its job at the molecular level. The Salk researchers, led by Joanne Chory, a professor in the Plant Molecular and Cellular Biology Laboratory and a Howard Hughes Medical Institute investigator, published their findings in this week's journal Nature. "The...

Salk scientists untangle steroid hormone signaling in plants

...d how the growth-boosting hormone accomplishes its job at the molecular level. The Salk researchers, led by Joanne Chory, a professor in the Plant Molecular and Cellular Biology Laboratory and a Howard Hughes Medical Institute investigator, published their findings in this week's journal Nature. "The...

University of Minnesota researchers take new look at cellular suicide

... bodyguard turned traitor, a protein whose regular job is to help repair severed DNA molecules will, in some cases, join forces with another protein to do the opposite and chop the DNA to bits, according to new research at the University of Minnesota. The chopping up of a cell's DNA occurs in response to...

The molecular post office inside the cell

...which is called translocon complex, takes over the job of transferring a newly produced protein through the membrane. Knowing the structure of the molecular machine helps scientists to understand how secretory and membrane proteins in a cell are expressed and sorted (Science, May 5, 2006). Sorting prot...

Scientists reverse evolution

...dentical genes allows one to keep doing its normal job and the other can change, or mutate. Most mutation...sappear. Others persist because they perform a new job that holds some advantage for allowing an organism to adapt. The quadrupling of Hox (and also other ...

New roles for growth factors: Enticing nerve cells to muscles

...and bone marrow cells. The Salk study adds on more job to an already long list. "Our study emphasizes that the nervous system does not necessarily rely on an entirely new set of molecules to govern axon navigation, but instead uses growth factors already involved in embryonic development in clever and n...

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