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Tag: "enters" at biology news

Study shows how retinoic acid enters a cell's nucleus

... years: exactly how an acid derived from vitamin A enters a cell's nucleus, where it has strong anti-carcino...gains entry into a cell's nucleus. When vitamin A enters a cell's cytoplasm (the portion that lies between the outer membrane and the nucleus), it can be con...

Compound might defeat African sleeping sickness, clinical trial beginning this month

...sickness, which occurs when the parasite over time enters the brain." The new drug candidates are active because they can cross the blood-brain barrier, a biological wall that protects the nervous system naturally but can block beneficial drugs, he said. Work is also progressing rapidly on a new drug for d...

Secrets to antibody's success against West Nile Virus surprise scientists

...elope that surrounds its genetic material after it enters a host cell. To reproduce, a virus must alter its envelope in order to inject its genetic material inside the cell. After that injection, the virus tricks the host cell into making more copies of the genetic material that can then be assembled int...

Gene therapy to lower blood pressure just enough

...tem." Its activity is halved 30 seconds after it enters the blood stream. Gene therapy can make cells generate more ANP. In previous studies, however, this kind of gene reduced blood pressure to dangerously low levels, said O'Malley. Obviously, a method of controlling the gene and the amount of ANP a ce...

Researchers create infectious hepatitis C virus in a test tube

... cycle, researchers think that in humans the virus enters a liver cell and delivers its RNA and proteins into the cell cytoplasm. HCV carries its genetic information in its RNA, which is separated from the protein, copied, and then joined with new protein components before being released from the liver cell...

Nanoscale method for investigating living systems

... react with your body. When, for example, caffeine enters a cell it stimulates the opening and closing of these ion channels. What we've found is that these quantum dots can form artificial pores that enhance the flow of ions and which we can control from the outside via voltage." Quantum dots can be encod...

Virus uses tiny RNA to evade the immune system

...nd T antigen is its most studied part." When SV40 enters a cell, it produces T antigen, which functions to trigger viral DNA replication. Unfortunately for the virus, T antigen also serves as a target for immune (T) cells, which can destroy infected cells and prevent the virus from spreading. Conveniently...

UCLA scientists reveal how Nipah virus infects cells

...ptor is the same doorway that the real Nipah virus enters to infect these cells. "We now can screen for small molecules that will block viral entry via Ephrin B-2 and develop them as therapeutic drugs," said Lee. "Because pigs are particularly susceptible to Nipah infection, public health officials could u...

Scientists find a maturity gene in fly

...this gene, the juvenile stage is shortened, and it enters adulthood early. The animal then dies because the ...hours ?five days after the egg was laid ?the larva enters metamorphosis and becomes a "prepupa" for 12 hours. Then "the head pops out of the front end of the...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...this gene, the juvenile stage is shortened, and it enters adulthood early. The animal then dies because the ...hours ?five days after the egg was laid ?the larva enters metamorphosis and becomes a "prepupa" for 12 hours. Then "the head pops out of the front end of the...

North & South American researchers find architectural abnormalities in T. cruzi ribosome

...mRNA) copies the information encoded on a gene, it enters a sea of ribosomes, where that genetic information is translated into a protein product. Scientists have long known there was something strange about the genetic translational machinery of the Chagas parasite. Unlike in other organisms, an identical...

Tiny roundworm's telomeres help scientists to tease apart different types of aging

... cell's structure and function begin to fail as it enters this state of growth arrest, called replicative senescence. "But even in very old people, blood cells, which divide continuously, don't have critically short telomeres. In humans and, as we know now, in worms, telomere length is certainly not a limi...

Drug resistant avian influenza viruses more common in Southeast Asia than North America

...protons allows the virus to shed its coat after it enters a cell-an essential step in the replication of the virus. Amantadine inhibits the function of the M2 protein and thus stops viral replication. "By analyzing the sequence of the transmembrane part of the M2 gene we were able to determine how frequen...

Vaginal gel may provide a new approach to HIV prevention

...inhibit the processes by which HIV attaches to and enters target cells could potentially provide a safe, effective and practical way to prevent HIV transmission in women, according to study investigators. The study, published online October 30 in the journal Nature was funded principally by the National Ins...

Does manganese inhaled from the shower represent a public health threat?

...which is found in food and many types of rocks and enters the air, soil and water. But, at higher levels, manganese is toxic to the central nervous system and can cause learning and coordination disabilities, behavioral changes and a condition that is similar to Parkinson's disease. Children, pregnant wome...

Purdue researchers find key to rice blast fungus

...d how they know to penetrate it." Once the fungus enters the rice leaf cells, the infected cells attempt to defend the plant by dying. This means death for young plants, while in older plants, rice grain is lost. The biggest rice blast problem is in Asia and Latin America where rice is an important food s...

Scientists unpick genetics of first 15 minutes of life

...' the early processes that take place once a sperm enters an egg, giving it a crucial role in the most funda...llulaire (France) on the project. "When the sperm enters the egg, the DNA it carries needs to be re-packaged so that it can engage in normal cellular activit...

Plant wounds trigger bacteria

...says that the pathogen Agrobacterium tumefaciens enters the wound where it copies the genes required for infection, which can slip into the plant's cells and their nuclear DNA, causing a cancer-like disease called crown gall. The cells of the crown gall tumor synthesize compounds called opines, which serv...

GROWing the next generation of water recycling plants

...r kitchen taps. Using GROW, much of the water that enters a building can be used twice before being placed into the national wastewater management system. "We had to carefully choose which semi-aquatic plants to use. One of the most successful is water mint, whose roots have disinfectant qualities," says P...

Odd energy mechanism in bacteria analyzed

...e algae that produce about half of the oxygen that enters Earth's atmosphere every day. The carbon cycle ultimately affects all plant and animal life on Earth. However, it's now clear that SAR11 has its own mechanism to use sunlight energy that does not involve chlorophyll. Rather, it uses retinal, the s...

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