DNA, A-Form

**Definition:** An isoform of DNA that occurs in an environment rich in SODIUM and POTASSIUM ions. It is a right-handed helix with 11 base pairs per turn, a pitch of 0.256 nm per base pair and a helical diameter of 2.3 nm.

**Tree numbers:** - D13.444.308.130 - G02.111.570.820.486.128 - G05.360.580.114

**Synonyms:** - A-DNA