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Tag: "known" at biology news

Researchers add new tool to tumor-treatment arsenal

...th a DNA-damaging agent, a cancer-suppressing gene known as the "guardian of the cell" (a protein called p53) responds by either killing the cell, if the damage is too severe, or allowing the cancer cell to repair the damaged DNA. If the DNA is repaired, cells can continue to multiply. The dilemma is that...

Scientists discover unique microbe in California's largest lake

...strain and saw that they were verysimilar to those known from a species of blue-green algae calledAcaryochl...ht."The new microbe is one of only three organisms known to science thatuse a combination of near-infrared light and visible light to produceoxygen by photos...

New SARS Protein Linked To Important Cell Doorway

...other viruses. SARS belongs to a class of viruses known as coronaviruses. Because those viruses typically ...frames, and the SARS sequence therefore came to be known as open reading frame 7a, or orf7a. To produce the orf7a protein, research instructor Christopher N...

NYC's First Rapid HIV Drug-resistant AIDS Case Prompts Call to Step Up HIV Prevention

...train of infection appears to be resistant to most known AIDS drugs. AIDS care providers see many cases of patients with a high degree of some drug resistance; however, doctors and providers can usually find a second or third line drug therapy regimen for effective treatment. This man's strain of infection...

Jumping gene helps explain immune system's abilities

...latingproteins. But until now, no jumping gene was known to behave just right. Writingin the Dec. 23 issue...ent antigen, and onand on.This a la carte process, known as V(D)J recombination, is similar tothe excision of jumping genes, but none had matched one of itsc...

UCSD Discovery Shows How Embryonic Stem Cells Perform 'Quality Control' Inspections

...latingproteins. But until now, no jumping gene was known to behave just right. Writingin the Dec. 23 issue...ent antigen, and onand on.This a la carte process, known as V(D)J recombination, is similar tothe excision of jumping genes, but none had matched one of itsc...

Scientists document complex genomic events leading to the birth of new genes

...more than one copy in humans. "Gene duplication is known to play a leading role in evolution for the creation of new genes," explained Francesca Ciccarelli, Ph.D., lead author on the study. The key to this, however, is that the duplicated copies of genes very quickly evolve functions that are significantly...

New therapy for HIV/AIDS eliminates needles and excessive toxicity

...latingproteins. But until now, no jumping gene was known to behave just right. Writingin the Dec. 23 issue...ent antigen, and onand on.This a la carte process, known as V(D)J recombination, is similar tothe excision of jumping genes, but none had matched one of itsc...

DNA Recombination and Repair—A New Twist to RecA Function

...that filaments of the bacterial RecA protein, long known for their role in homologous recombination and DNA repair, have properties reminiscent of a molecular motor as well. RecA filaments consist of DNA helices lined with RecA protein. RecA filaments invade a region of double-stranded DNA with similar nuc...

Gene sequencing explains bioremediation 'bug'

...latingproteins. But until now, no jumping gene was known to behave just right. Writingin the Dec. 23 issue...ent antigen, and onand on.This a la carte process, known as V(D)J recombination, is similar tothe excision of jumping genes, but none had matched one of itsc...

Zebrafish may hold key to understanding human nerve cell development

...e. Traditionally viewed as supportingactors, cells known as glia may be essential for the normal developmen...y of Utah School of Medicine. Scientistslong have known that glial cells, or simply glia, are essential forhealthy nerve cells. However, in the last 10 year...

New studies suggest airborne SARS transmission is possible

...borne transmission, according to Dr. Yu, "no other known routes of infectious diseases transmission could adequately explain the spread of the disease in the outbreak, and hence we feel that the evidence is quite strong." An editorial accompanying the Toronto study, by Tommy Tong, MBBS, of Princess Margar...

Harmful Bacterium Commonly Found in Poultry May Survive Refrigeration and Frozen Storage Combined

...e. Traditionally viewed as supportingactors, cells known as glia may be essential for the normal developmen...y of Utah School of Medicine. Scientistslong have known that glial cells, or simply glia, are essential forhealthy nerve cells. However, in the last 10 year...

GenMAPP 2.0 released

...e. Traditionally viewed as supportingactors, cells known as glia may be essential for the normal developmen...y of Utah School of Medicine. Scientistslong have known that glial cells, or simply glia, are essential forhealthy nerve cells. However, in the last 10 year...

The Shapes Of Life: NIGMS Project Yields More Than 1,000 Protein Structures

...hese structures are very different from previously known structures, said Norvell. The findings contribute to the initiative’s ultimate goal of providing structural information on 4,000-6,000 unique proteins that represent the variety found in organisms ranging from bacteria to humans. Researchers can use...

Beyond lithium for bipolar disorder

...rgets for drugs to treat the disorder. Lithium is known to inhibit the production of an important cellular...ignaling molecule called PACAP in the brain and is known to be close to a chromosomal region that genetic studies have shown to be associated with a higher r...

Novel ultrafast laser detection of cancer cells also may improve understanding of stem cells

...mitochondria in cells gone wrong. Mitochondria are known as the power pack of cells, energizing them like batteries do flashlight bulbs. "There are hundreds of mitochondria, sometimes thousands, in a cell," says Gourley. "To see them in the old way requires a time-consuming process like fluorescent taggin...

PANTHER Protein Classification System Database 5.0

...s to browse or analyze large sets ofgenes by their known or inferred biological functions and explore morethan 60 pathways associated with protein families, subfamilies, andtraining sequences using diagrams drawn by expert curators.The new PANTHER system Pathway Module is the result of an ongoingcollaborat...

New research indicates a 'troubled' greenhouse is brewing

...s spanning the ancient greenhouse event. "This is known to have been a time of high atmospheric carbon dio..."Mint julep, anyone?" Buried soils have long been known as sources of evidence of past rainfall, but Retallack says they also can be used to determine the s...

Duke Chemists Isolating Individual Molecules Of Toxic Protein In Alzheimer's, Parkinson's Disease

... the building blocks of the toxic protein polymers known as amyloid fibrils. Atomic force microscopes use a...interact to form these amyloid fibrils is just not known at this point," said Akhremitchev. "And that is why it is such a great challenge. That's what we wan...

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