DNA sequence
A
DNA 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, and typically these are printed abutting one another without gaps, as in the sequence AAAGTCTGAC. 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.
See also