出典:Wikipedia
出典:『Wikipedia』 (2011/05/09 06:38 UTC 版)
The sequence or primary structure of a nucleic acid is the composition of atoms that make up the nucleic acid and the chemical bonds that those atoms. Because nucleic acids, such as DNA and RNA, are unbranched polymers, this specification is equivalent to specifying the sequence of nucleotides that comprise the molecule. This sequence is written as a succession of letters representing a real or hypothetical nucleic acid molecule or strand. By convention, the primary structure of a DNA or RNA molecule is reported from the 5' end to the 3' end.