News tagged with dna sequences
16th-century Korean mummy provides clue to hepatitis B virus genetic code
The discovery of a mummified Korean child with relatively preserved organs enabled an Israeli-South Korean scientific team to conduct a genetic analysis on a liver biopsy which revealed a unique hepatitis ...
Other Sciences / Archaeology & Fossils
May 29, 2012 |
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Velvet spiders emerge from underground in new cybertaxonomic monograph
Velvet spiders include some of the most beautiful arachnids in Europe and some of the world's most cooperative species. Social species can be very abundant in parts of tropical Africa and Asia with conspicuous co ...
May 23, 2012 |
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New technique used to discover new viruses in poultry
In a search to find better ways to control viral enteric diseases in birds, U.S. Department of Agriculture (USDA) scientists have unearthed a treasure trove of previously known and unknown viruses in poultry ...
May 18, 2012 |
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Research uncovers new exception to decades-old rule about RNA splicing
There are always exceptions to a rule, even one that has prevailed for more than three decades, as demonstrated by a Cold Spring Harbor Laboratory (CSHL) study on RNA splicing, a cellular editing process. The rule-flaunting ...
May 17, 2012 |
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New technique reveals unseen information in DNA code
Imagine reading an entire book, but then realizing that your glasses did not allow you to distinguish "g" from "q." What details did you miss? Geneticists faced a similar problem with the recent discovery ...
May 17, 2012 |
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DNA tug of war
A mathematical model created by Aalto University (Finland) researcher Timo Ikonen explains for the first time how the DNA chains in our genome are translocated through nanopores that are only a couple of nanometres thick.
May 11, 2012 |
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Enzyme corrects more than one million faults in DNA replication
Scientists from the Medical Research Council (MRC) Institute of Genetics and Molecular Medicine (IGMM) at the University of Edinburgh have discovered an enzyme that corrects the most common mistake in mammalian DNA.
May 10, 2012 |
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Protein analysis investigates marine worm community
(Phys.org) -- Techniques used by researchers from the Department of Energy's Oak Ridge National Laboratory to analyze a simple marine worm and its resident bacteria could accelerate efforts to understand more ...
May 09, 2012 |
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Study unravels origin of devastating kiwifruit bacterium
An international research team led by Virginia Tech Associate Professor Boris Vinatzer and Giorgio Balestra of the University of Tuscia in Italy has used the latest DNA sequencing technology to trace a devastating ...
May 09, 2012 |
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Agricultural bacteria: Blowing in the wind
The 1930s Dust Bowl proved what a disastrous effect wind can have on dry, unprotected topsoil. Now a new study has uncovered a less obvious, but equally troubling impact of wind: Not only can it carry away soil particles, ...
May 09, 2012 |
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A needle in a haystack: How does a broken DNA molecule get repaired?
Scientists from the Kavli Institute of Nanoscience at Delft University of Technology have discovered a key element in the mechanism of DNA repair. When the DNA double helix breaks, the broken end goes searching for the similar ...
May 03, 2012 |
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Orangutans harbor ancient primate Alu
Alu elements infiltrated the ancestral primate genome about 65 million years ago. Once gained an Alu element is rarely lost so comparison of Alu between species can be used to map primate evolution and diversity. New research ...
Apr 30, 2012 |
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24 new species of lizards discovered on Caribbean islands are close to extinction
In a single new scientific publication, 24 new species of lizards known as skinks, all from islands in the Caribbean, have been discovered and scientifically named. According to Blair Hedges, a professor of ...
Apr 30, 2012 |
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lobSTR algorithm rolls DNA fingerprinting into 21st century
As any crime show buff can tell you, DNA evidence identifies a victim's remains, fingers the guilty, and sets the innocent free. But in reality, the processing of forensic DNA evidence takes much longer than a 60-minute primetime ...
Apr 27, 2012 |
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New 'bench top' machines open up DNA sequencing
(Phys.org) -- Research carried out by scientists at the University of Birmingham have found that new ‘bench-top’ machines for sequencing DNA are capable of accurately identifying over 95% of a genome, signalling ...
Apr 27, 2012 |
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DNA sequence
A DNA sequence or genetic sequence is a succession of letters representing the primary structure of a real or hypothetical DNA molecule or strand, with the capacity to carry information as described by the central dogma of molecular biology.
The possible letters are A, C, G, and T, representing the four nucleotide bases of a DNA strand — adenine, cytosine, guanine, thymine — covalently linked to a phosphodiester backbone. In the typical case, the sequences are printed abutting one another without gaps, as in the sequence AAAGTCTGAC, read left to right in the 5' to 3' direction. Short sequences of nucleotides are referred to as oligonucleotides and are used in a range of laboratory applications in molecular biology. With regard to biological function, a DNA sequence may be considered sense or antisense, and either coding or noncoding. DNA sequences can also contain "junk DNA."
Sequences can be derived from the biological raw material through a process called DNA sequencing.
In some special cases, letters besides A, T, C, and G are present in a sequence. These letters represent ambiguity. Of all the molecules sampled, there is more than one kind of nucleotide at that position. The rules of the International Union of Pure and Applied Chemistry (IUPAC) are as follows:
For more information about DNA sequence, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
