News tagged with dna sequences
As the body ages, the physical effects are notable; wrinkles in the skin appear, physical exertion becomes harder. But there are also less visible processes going on. Inside aging brains there is another phenomenon at work, ...
Neuroscience Apr 08, 2013 | 5 / 5 (3) | 0 |
A three molecule complex may be a target for treating Huntington's disease, a genetic disorder affecting the brain. This finding by an international research team including scientists from the German Center for Neurodegenerative ...
Diseases, Conditions, Syndromes Feb 26, 2013 | 5 / 5 (2) | 0 |
In one of the first genome-wide studies to hunt for both genes and their regulatory "tags" in patients suffering from a common disease, researchers have found a clear role for the tags in mediating genetic ...
Genetics Jan 20, 2013 | 4.6 / 5 (7) | 0 |
An international team, led by researchers from the University of California, San Diego School of Medicine, has discovered that "random" mutations in the genome are not quite so random after all. Their study, ...
Genetics Dec 20, 2012 | 5 / 5 (1) | 0 |
Scientists at the Johns Hopkins Kimmel Cancer Center have combined the ability to detect cancer DNA in the blood with genome sequencing technology in a test that could be used to screen for cancers, monitor cancer patients ...
Cancer Nov 28, 2012 | not rated yet | 0 |
(Medical Xpress)—A new study in the US and Germany has added to our understanding of the human cytomegalovirus (HCMV) and how it manipulates the cells it infects.
Medical research Nov 23, 2012 | 4.8 / 5 (5) | 1 |
A recent finding by medical geneticists sheds new light on how Facioscapulohumeral Muscular Dystrophy develops and how it might be treated. More commonly known as FSHD, the devastating disease affects both ...
Genetics Nov 11, 2012 | 4.5 / 5 (2) | 0 |
(Medical Xpress)—The human face is a fantastically intricate thing. The billions of people on the planet have faces that are individually recognizable because each has subtle differences in its folds and ...
Genetics Oct 22, 2012 | 4.7 / 5 (3) | 0 |
Researchers at the Duke-NUS Graduate Medical School in Singapore have identified numerous new subtypes of gastric cancer that are triggered by environmental factors.
Cancer Oct 17, 2012 | 5 / 5 (1) | 0 |
(Medical Xpress)—Scanning the DNA of two people with a rare disease has led scientists to identify the precise genetic error responsible for their disorder, primary ciliary dyskinesia.
Genetics Oct 16, 2012 | 5 / 5 (1) | 0 |
(Medical Xpress)—One small change to the DNA sequence can cause more weighty changes to the human body, according to a new study released today.
Genetics Sep 17, 2012 | not rated yet | 0 |
Scientists at the Gladstone Institutes have revealed the precise order and timing of hundreds of genetic "switches" required to construct a fully functional heart from embryonic heart cells—providing new ...
Medical research Sep 13, 2012 | 5 / 5 (3) | 0 |
Scientists have restored the sense of smell in mice through gene therapy for the first time—a hopeful sign for people who can't smell anything from birth or lose it due to disease.
Medical research Sep 02, 2012 | 5 / 5 (3) | 1 |
Researchers at the Stanford University School of Medicine have for the first time sequenced the genome of an unborn baby using only a blood sample from the mother.
Genetics Jul 04, 2012 | 3.7 / 5 (3) | 0 |
(Medical Xpress) -- Collaboration between scientists at Cambridge University and the Babraham Institute have demonstrated a new technique that will significantly improve scientists' ability to perform epigenetics ...
Genetics Apr 26, 2012 | 5 / 5 (2) | 1 |
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
This text uses material from Wikipedia and is available under the GNU Free Documentation License.