News tagged with dna sequences
The connection between human avian-origin influenza A (H7N9) virus infection and environmental sources of the virus were determined based on clinical data, epidemiology, and virological characteristics of the three early ...
Diseases, Conditions, Syndromes May 15, 2013 | 5 / 5 (1) | 0
A change to the so-called TERT gene considerably increases the risk of breast and ovarian cancer. This is the result of a current, multicenter study in which the University Department of Gynaecology and the ...
Cancer May 10, 2013 | not rated yet | 0
Can the patterns in tree branches or the meandering bends in a river provide clues that could lead to better cancer therapies? According to a new study from Virginia Commonwealth University Massey Cancer ...
Medical research May 01, 2013 | 5 / 5 (2) | 0 |
(Medical Xpress)—Using a state-of-the-art DNA sequencing technique, UA researchers have discovered genetic mutations underlying seizure disorders in previously undiagnosed children.
Neuroscience May 07, 2013 | 5 / 5 (1) | 0 |
In 2009, the DNA alphabet expanded. Scientists discovered that an extra letter or "sixth nucleotide" was surprisingly abundant in DNA from stem cells and brain cells.
Neuroscience Oct 30, 2011 | 5 / 5 (8) | 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 of researchers from Leeds, London and Berlin has discovered more about the function of muscle stem cells, thanks to next-generation DNA sequencing techniques.
Genetics Nov 20, 2011 | 5 / 5 (4) | 0 |
The tick-borne Lone Star virus has been conclusively identified as part of a family of other tick-borne viruses called bunyaviruses, which often cause fever, respiratory problems and bleeding, according to ...
Diseases, Conditions, Syndromes May 02, 2013 | 5 / 5 (1) | 0 |
(AP) -- George Eberhardt turned 107 last month, and scientists would love to know how he and other older folks like him made it that far. So he's going to hand over some of his DNA. He's one of 100 centenarians ...
Genetics Oct 26, 2011 | 4.4 / 5 (11) | 5
(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 |
Researchers at UT Southwestern Medical Center have found that alternative splicing – a process that allows a single gene to code for multiple proteins – appears to be a new potential target for anti-telomerase ...
Cancer Apr 19, 2013 | 5 / 5 (4) | 0 |
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 |
Using the latest gene sequencing tools to examine so-called epigenetic influences on the DNA makeup of colon cancer, a Johns Hopkins team says its results suggest cancer treatment might eventually be more tolerable and successful ...
Cancer Jun 26, 2011 | 4.4 / 5 (8) | 0 |
(Medical Xpress)—Researchers at the University of Illinois have identified biomarkers that can be used to determine ovarian cancer survival and recurrence, and have shown how these biomarkers interact with ...
Cancer Apr 30, 2013 | not rated yet | 1 |
You don't 'own' your own genes: Researchers raise alarm about loss of individual 'genomic liberty' due to gene patents
Humans don't "own" their own genes, the cellular chemicals that define who they are and what diseases they might be at risk for. Through more than 40,000 patents on DNA molecules, companies have essentially ...
Genetics Mar 26, 2013 | 4.8 / 5 (20) | 17 |
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
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