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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 ".


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