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Tag: "types" at biology news

One species, many genomes

...sons for conduction the study. "By extending these types of studies to other species we hope to help breeders to produce varieties that are optimally adapted to rapidly changing environmental conditions," explains Weigel. He is already collaborating with the International Rice Research Institute (IRRI) in ...

Common cancer gene sends death order to tiny killer

...NA) made by the same machinery that produces other types of RNA in the cell, such as the messenger RNAs that carry the instructions to make proteins. Once produced, microRNAs stick to messenger RNAs and, like crumpled paper jammed in a copy machine, prevent proteins from being made. Josh Mendell, M.D.,...

Cellular message movement captured on video

...een-labeled actin filaments, the thinnest of three types of protein filaments that make up the cytoskeleton of cells of higher organisms. Paxillin either slides along the actin filaments or is pulled by them. In a surprise, Chien and Hu also showed that paxillin itself forms long, fibrous structures in the...

Blood test may help signal tumor's remission, return in throat cancer patients

... would need to be performed on patients with these types of cancer as well....

Loss of stem cells correlates with premature aging in animal study

...oteins in the DNA damage response underlie certain types of cancer and other disorders in humans. This work...tem cells don’t divide as frequently as other cell types since they need to maintain the integrity of their DNA, and multiple divisions lead to natural break...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...f any one continent is usually a composite of many types of animals." Yellow and black spotted frog from caves in Haiti. Eleutherodactylus counouspeus . The field work for the study required nearly three decades to complete because many of the species are restricted to remote and isolated mounta...

Newly found sensing system enables certain bacteria to resist human immune defenses

... the National Academy of Science. Other well-known types of gram-positive bacteria include agents that caus...ax, strep throat, flesh-eating disease and various types of food poisoning. In gram-negative bacteria—such as those that cause plague and salmonellosis—a ...

Brightening prospects of using fluorescent nanotubes in medical applications

...s creates soot that contains a number of different types of nanotubes: metallic, semiconducting, double-walled, single-walled, etc. Of these, only the single-walled semiconducting nanotubes, or SWNTs, are capable of producing light. Metallic nanotubes actually inhibit the brightness of their fluorescent ne...

Research shows cord blood comparable to matched bone marrow

...erally try to have the donors’ and recipients’ HLA types match as closely as possible. Wagner added that ...tentially lethal complication, especially when HLA types are mismatched. Rates of leukemia relapse also are lower with mismatched umbilical cord blood transp...

Study shows lizard moms dress their children for success

...e highest fitness. If these same estradiol-induced types had the highest survival rates in all years, there would be no need for the females to respond to their social environment--they would just always give their eggs estradiol." To understand these complex interactions more fully, the researchers pla...

New findings challenge established views on human genome

...ch genes, along with regulatory elements and other types of DNA sequences that do not code for proteins, in...the first systematic effort to determine where all types of functional elements are located and how they are organized. In the pilot phase, ENCODE resear...

Cancer stem cells similar to normal stem cells can thwart anti-cancer agents

...tant, tumor-initiating population of cells in many types of refractory cancers. “Because of the similarities between the way that normal stem cells and cancer stem cells protect themselves, cancer therapies have to be designed specifically to target cancer stem cells while sparing normal stem cells,” she e...

Warning from Asian bees

...ian bees (Apis cerana) are capable of carrying two types of Varroa mite – destructor and jacobsoni; the latter would not threaten the health of local bee populations but destructor has wiped out commercial hives and feral populations the world over and Australia is the last remaining major beekeeping count...

Runners -- Let thirst be your guide

...t could put some individuals engaging in prolonged types of endurance exercise at risk of potentially lethal water intoxication, say international experts who study disorders of water metabolism. Such exercise includes marathons, triathlons, and long distance cycling. This serious condition, known as exer...

Researchers demonstrate way to control tree height

...istinct kinds of genes and more than 160 different types of genetic insertions to create about 600 genetically modified trees. All caused decreased signaling by gibberellic acids. They were grown in the field with USDA approval, and assessed several times for variation in size and appearance. Other than...

Fat fish put obesity on the hook

...is, sleep apnea and respiratory problems, and some types of cancer. ...

Surprising origin of cell's internal highways

... Microtubules are the largest of the three main types of filaments that make up the cytoskeleton -- a web of microscopic fibers inside the cell. They form when two globular proteins, alpha- and beta-tubulin, polymerize into long chains, which then assemble into long, hollow tubes. In order to gain a...

Study identifies 5 genetic themes key to keeping stem cells in a primitive, flexible state

...have tried to compare gene expression in different types of stem cells, the strategy used in this study was unique. Rather than simply searching for any genes expressed by stem cells, the researchers looked for genes whose expression was also correlated with the master stem cell regulator gene Oct4. They a...

Revealed -- Mosquito genes that could be controlling the spread of killer viruses

...toes may help us understand why, for example, some types of mosquitoes can transmit a particular human pathogen while others cannot. If those that cannot have evolved an effective immune system that fights off the pathogen, we may be able to use this knowledge to enhance specific reactions of the immune sy...

Experts predict Tamiflu could halve the pandemic influenza death toll versus no intervention

...ersity of Michigan. “Tamiflu is active against all types of influenza virus and will be immediately available during a pandemic if stockpiles are adequate. The big question is, should we be stockpiling for treatment only or for both treatment and prophylaxis"”...

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