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Tag: "pair" at biology news

Exploring the dark matter of the genome

...The latest results from the DHGP are reported in a pair of papers in the June 15, 2007 issue of Science. The annotated heterochromatic sequences reveal over 200 protein-coding genes. The heterochromatin also includes other features of biological importance, including sequences that code for non-protei...

Electric fish conduct electric duets in aquatic courtship

...ical pulses based on sex. They video recorded four pair of mating mormyrids (a feat in itself, since the species rarely breeds successfully in captivity) and identified nine common motor displays and 11 specific pulse sequences common to courtship and mating. "Knowing the electrical and motor patterns ...

The mouflons of the Kerguelen archipelago

...rtunity to hunt mouflons (a type of wild sheep). A pair of Corsican mouflons was imported from the Vincennes Zoo in Paris. Initially, the mouflon population grew exponentially, and then, from the early 1980s, it fluctuated between 300 and 700 individuals. The history of a fascinating research project...

New designer lipid-like peptide with lipid nanostructures for drug delivery systems

...ch, an art object, a music instrument, a ski, or a pair of sunglasses, we have the ultimate control to the outcome of the structure and their properties” Zhang added. This study stemmed from a scientific visit by Peter Laggner to Shuguang Zhang at MIT in Cambridge, USA in May 2006. They shared some ...

Anthrax paralyzes immune cells with lethal toxin, UF research shows

...iterally cuts the gas line. The toxin works like a pair of scissors, snipping off the ends of a key protein and preventing the transmission of messages within the cell. As a result, immune cells never receive the green light to assemble the actin motor, Southwick's findings demonstrate. "Together, thes...

DNA repair proteins monitored at double-strand break

...als linked to DNA repair. Inactive ATM exists as a pair of these molecules linked together. Kastan previously reported in the journal Nature how the inactive ATM molecules separate from each other in response to a double-strand break ( http://www.stjude.org/media/0,2561,453_5484_3126,00.html ). To cont...

Discovery of new cave millipedes casts light on Arizona cave ecology

... new genus was confirmed by analysis of the eighth pair of legs (or gonopods) on the male specimens. Gonopods are highly modified legs used to transfer spermatophores (packets of sperm) to the females during reproduction. For the north rim species, Voyles explained that the discovery will result in the...

Gut research yields new anti-cancer approach

...wo related proteins, alpha and beta tubulin, which pair up to form a chain and then wind into a helix. The current studies found that high-dose PPARgamma inhibitors reduced levels of alpha and beta tubulin by 60 to 70 percent. Also described in the publication are studies where PPARgamma inhibitors killed...

Horse genome assembled

...e horse genome, which means, on average, each base pair has been sequenced almost seven times over. Researchers can access the horse genome sequence data through the following public databases: GenBank ( www.ncbi.nih.gov/Genbank ) at NIH's National Center for Biotechnology Information (NCBI); NCBI's Map V...

Remote sheep population resists genetic drift

...ozens of generations from a single male and female pair transplanted to Haute Island from a Parisian zoo, has maintained the genetic diversity of its founding parents. This finding challenges the widely accepted theory of genetic drift, which states the genetic diversity of an inbred population will decre...

UTSA researchers examine effects of global warming on Antarctic

...mber following a two-week trip to the region. The pair were part of an international expedition that included scientists and educators from the United States, Chile and Sweden. The National Science Foundation (NSF) funded the 6,000 mile trip which was designed to allow scientists to collect data ab...

Researchers find gene mutation that causes infertility in male mice

... production. The mutant allele (one version of the pair of genes we inherit from each parent) is dominant; females who carry it remain fertile but carry the defect and pass the mutation on to future generations. However, female carriers show higher rates of abnormalities during meiosis, which can potent...

A rarity among arachnids, whip spiders have a sociable family life

...stilettos that are used to capture prey. The first pair of legs has developed into long whiplike feelers that are three to four times longer than the remaining three pairs of legs. The exceptionally flexible whips can move 360 degrees around their bodies and are covered with hairs that sense their environ...

FSU researchers determine a critical factor in workings of proteins

...ers and other life-threatening conditions. Now, a pair of Florida State University researchers' new theory has been proven to accurately predict the association rate for proteins. Their theory is outlined in the February issue of the scientific journal Structure. "A protein can have multiple targets o...

Twin studies reveal genetic components leading to cardiac and kidney disease

...traits between the siblings in each MZ and DZ twin pair establishes what is called the index of heritability. The human genome has three billion base pairs and about 30,000 genes. O’Connor and his research team have looked at about 900 of these 30,000 genes. "We’re just scratching the surface," h...

Lead with a poisonous electron shield

... The reason for this is the emerging free electron pair of the lead cation. It acts as an electronic shield on one side, pushing away the fourth ligand. Such a dramatic geometrical distortion at the active center could explain why lead inhibits this enzyme. The different behavior of lead in these two e...

Breathing easy: When it comes to oxygen, a bug's life is full of it

...y to tissues and muscles. Insects typically have a pair of spiracles for each thoracic and abdominal segment. The same tubes that transport oxygen into the insect body usher out carbon dioxide. Insects use different methods to release carbon dioxide, including opening the thoracic spiracles (the ones c...

Faster, low cost sequencing technologies needed to drive era of personalized medicine

..." said Gu. It is estimated that a single base pair can be sequenced for every DNA probe, which means that optimizing the nanoprinting process is critical to the goal of a $1,000 genome, according to Zhang. The researchers' first goal is a proof of principal for their approach. They plan to synthe...

Uncovering DNA's 'sweet' secret

...g a viable genetic system For example, it cannot pair with other nucleic acids - unlike DNA and RNA which can and must pair with each other. Also the steep angle, or inclination, between the sugar backbone and the bases of h...

New clues to how sex evolves

...ze specific sequences of DNA. Each protein acts to pair and link together one or two specific chromosomes among C. elegans's full set of six. The him and zim genes appear in tandem on a single chromosome, which raises the question of how they evolved. "There are many families of zinc-finger proteins i...

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