Tag: "copy" at biology news
Tumor Suppressor Gene Located In Liver Cancer Cells
... from 64 percent of patients studied had lost one copy
of the gene. The deletion of one copy, or allele, means that a mutation in the remaining copy
can limit or destroy a cell's ability to produce functional protein. Next, the researchers began the...
Second Breast Cancer Gene Located
... Unlike BRCA1, however, inheriting a defective copy
of BRCA2 does not appearto put women at a signific...ene,"Futreal said. "In these families, the normal copy
of the gene is knockedout, the mutated copy
is retained, and the gene loses its ability to functionn...
Mutate Or Die: New Polymerase Gives Desperate Yeast An Option
...A. Unlike other polymerases, which eitherrefuse to copy
damaged DNA or which help repair it, zeta lets a cell replicate damaged DNA, giving the cell a chance atlife at the cost of a higher mutation rate for the organism. "Replicating past the damaged site is the leastfavored mechanism of dealing wit...
Newly Discovered Gene Halts Cell Division and May Have Cancer Link
...e to be discovered was p53, which allows a cell to copy
its DNA at an earlier phase in the cell cycle. Def... out of control and leave some new cells without a copy
of each chromosome, which can lead to cancer," Dr. Benezra says. The MAD2 checkpoint appears to pla...
Scientists Identify Gene For Sexual Behavior In Male Flies
... ability to recognize a female.Males with a normal copy
of the gene, at right, pursue only females.Males with an alteration, or mutation, of the fru gene, at left,court both sexes, and sometimes form chains with each male courting theone in front of it. (courtesy: Jeffrey Hall, BrandeisUniversity) The l...
Molecular Imposter Rebuts Long
...chmore to do with DNA's shape and the enzymes that copy
it. This finding brings into question decades of dogma on DNAreplication, says researcher Eric Kool of the Universityof Rochester. Kool adds that the new information may helpresearchers develop new drugs that are better able to sneak inand kill ...
NIH Team Discovers Endocrine Tumor Gene
...ppressor gene,leaving a child with only one normal copy
of the gene. If that single, normal gene mutates ...h tumor tissue for loss of a segment of the normal copy
of the chromosome a patient would have inherited from an unaffected parent, and to identify a specif...
Genetic Trickery Offers New Way to Target HIV
...thold so that the enzyme reverse transcriptase can copy
the viral genetic code. Initiating the copying process atprecisely the right spot is the primer's critical task. Rosenblatt's team genetically engineered a new primer, amutant tRNA that docks at a different site on the HIV template,causing rever...
Resistance To Leptin Contributes To Obesity
..., called Yellow Agouti (Ay), is obese due tosingle copy
of a mutant gene. In the leptin injection study, NZO and Ay mice did not respond tosubcutaneous leptin doses of 5 micrograms per hour, a 10 times greater dosethan required to achieve a maximum response in the lean mice. The DIO micelost weig...
New Gene May Intensify Breast Cancer Growth
...arm of chromosome 20 for genes whose expressionand copy
number are elevated in breast cancer. The gene is expressed at lowerlevels in normal human tissue. AIB1 is the most recently identified member of agene family known as SRC-1 (steroid receptor coactivator), all of which interactwith genes for steroid ...
Mutant Gene Not Sole Explanation For Hiv Non-Progression
...wn that individuals with one mutant copy
of the CCR5 gene are disproportiona...LIR team found that people with one copy
of the mutant gene (and one copy
of the normal gene) were over-represented in ...
Gene For Last Major Form Of Batten Disease Discovered
... from each parent. People with only one defective copy
of thegene do not develop the disease, but can pass the gene on to their children. In the NCLs, a fluorescent pigment accumulates in bubble-like compartmentscalled lysosomes that are found within cells. Lysosomes act as the cell?srecycling centers, ...
Report Notes Difficulties In Eliminating E. Coli O157:H7 From Food Supply
...alfa sprouts, yogurt, sandwiches, and water. For a copy
of IFT's Scientific Status Summary, contact Angela Dansby at (312)782-8424 X134....
Competitive Inhibition May Enhance Safety Of Minimally Processed Fruits And Vegetables
...ted meat products to guard against spoilage. For a copy
of the article or Sept. 1997 issue of Food Technology, contact AngelaDansby at (312) 782-8424 X134....
Pitt Researchers Construct Novel Delivery System For Gene Therapy Of Liver Disorders
... have created a model in which we have used a good copy
of hAAT to show that RCRs are a greatway to get ge... machinery to producetherapeutic proteins." A bad copy
of the hAAT gene is thought to causepulmonary emphysema and liver disease. Introducing a good copy
Ancient Greek Text Shows Musical View Of Pregnancy According To Translation By University Of Cincinnati Professor
... Italy. Parker studied it andobtained a microfiche copy
for further study during a Rome Prizefellowship he won from the American Academy in Rome in 1996....
Peutz-Jeghers Disease Gene Identified: Enzyme Loss Causes Polyps And Cancer
...ntaneous loss of the second and only functional copy
of this gene in somatic cells. Simultaneously and independently, a second research team headed by Lauri Aaltonen at the University of Helsinki, who had identified the linkage to chromosome 19p13.3, also found defects in the STK11 gene in ...
'Rolling Circles' Provide New Way to Amplify and Detect DNA
...m so the organism's own replication machinery will copy
it. The third widely used option for making short strands ofDNA, computerized chemical synthesis, relies on a machine tosynthesize DNA sequences from free DNA nucleotides. But thereagents and solvents used in the synthesis create toxic byprod...
Duke Researchers Develop First Treatment For Rare Muscle Disease
...ating Pompe disease. They hope to inject a working copy
of thegene into muscle cells using a modified virus to carry the gene into cells. Ifsuccessful, a gene therapy strategy would allow the muscle to generate its ownenzyme and eliminate the need for lifetime injections of the enzyme. "We are hope...
Harvard Medical School Researchers Identify Four Human Genes Essential To Cell Division; Discovery Yields New Target For Cancer Therapies
...identical daughtercells, each containing an intact copy
of the parent cell's genetic information. An essential step in the development of any new drug is an accuratedetection system that will report whether the compound being tested is havingthe desired effect on the target cell. If APC inhibitio...
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