DNA의 형성 가능한 구조. 기본적으로 DoubleHelix이나, 다음과 같은 상세 구조가 가능하다.

• A-form
• B-form : The most favorable or stable structure.Right-handed double strand.
• Z-form : Left-handed. zig-zag form. It is temporally formed from B-form , and then regulates the transcription of the gene. The relations with the immune response and some diseases were reported.

• G-Quadruplex : H-bonding between four guanine.

• i-motif : H-bonding between cytosine and cytosine.

SeeAlso RnaStructure