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[[Image:DNA_sequence.png|right|thumb|268px|part of a DNA sequence]]
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{{mergeto|Genetic code|date=February 2007}}
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[[Image:DNA_sequence.png|right|thumb|268px|Electropherogram printout from automated sequencer showing part of a 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]].
 
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]].
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Sequences can be derived from the biological raw material through a process called [[DNA sequencing]].
 
Sequences can be derived from the biological raw material through a process called [[DNA sequencing]].
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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:
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A = adenine
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C = cytosine
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G = guanine
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T = thymine
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U = uracil
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R = G A (purine)
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Y = T C (pyrimidine)
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K = G T (keto)
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M = A C (amino)
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S = G C (strong bonds)
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W = A T (weak bonds)
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B = G T C (all but A)
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D = G A T (all but C)
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H = A C T (all but G)
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V = G C A (all but T)
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N = A G C T (any)
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== See also==
 
== See also==
 
* [[DNA]]
 
* [[DNA]]
 
* [[DNA motif]]
 
* [[DNA motif]]
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* [[Single nucleotide polymorphism|Single nucleotide polymorphism (SNP)]]
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[[Category:DNA]]
 
[[Category:DNA]]
   
[[de:DNA-Sequenz]]
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:cs:Sekvence DNA
[[id:Sekuens DNA]]
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:de:DNA-Sequenz
[[zh:DNA序列]]
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:zh:DNA序列
 
{{enWP|DNA sequence}}
 
{{enWP|DNA sequence}}

Latest revision as of 06:27, February 21, 2007

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It has been suggested that this article or section be merged into Genetic code. (Discuss)
DNA sequence

Electropherogram printout from automated sequencer showing part of a 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.

The possible letters are A, C, G, and T, representing the four nucleotide subunits of a DNA strand - adenine, cytosine, guanine, thymine bases covalently linked to phospho-backbone. Typically the sequences are printed abutting one another without gaps, as in the sequence AAAGTCTGAC, going from 5' to 3' from left to right. A succession of any number of nucleotides greater than four is liable to be called a sequence. With regard to its biological function, which may depend on context, a sequence may be sense or anti-sense, 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:

       A = adenine           
       C = cytosine            
       G = guanine             
       T = thymine           
       U = uracil
       R = G A (purine)        
       Y = T C (pyrimidine)    
       K = G T (keto)    
       M = A C (amino)
       S = G C (strong bonds)
       W = A T (weak bonds)
       B = G T C (all but A)
       D = G A T (all but C)
       H = A C T (all but G)
       V = G C A (all but T)
       N = A G C T (any)     


See alsoEdit

cs:Sekvence DNA
de:DNA-Sequenz
zh:DNA序列
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