DNA sequence Guide, Meaning , Facts, Information and Description
A
DNA sequence (sometimes
genetic sequence) is a succession of letters representing the
primary structure of a real or hypothetical
DNA molecule or strand,
The possible letters are
A,
C,
G, and
T, representing the four
nucleotide subunits of a DNA strand (
adenine,
cytosine,
guanine,
thymine), and typically these are printed abutting one another without gaps, as in the sequence AAAGTCTGAC. This coded sequence is sometimes referred to as
genetic information. 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 (see
DNA), and either
coding or
noncoding. DNA sequences can also contain "
junk DNA".
See also
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