Chemicals and Drugs

A-Form DNA

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.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

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.

MeSH Record

Classification

Broader headings

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See Also

MeSH Record

Synonyms

3 entry terms
  • A-DNA
  • DNA, A-Form
  • DNA, A Form

MeSH Record

Aspects Covered

29 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

History Note

2004; use DNA 1986-2003

MeSH Record

Previous Indexing

  • DNA (1985-2003)

MeSH Hierarchy

Tree Numbers

  1. D13.444w.308w.130w
  2. G02.111.570.820w.486w.128w
  3. G05.360w.580w.114w

AMA Style

References

  1. National Library of Medicine. A-Form DNA. Medical Subject Headings (MeSH). 2026. Unique ID D044704. http://id.nlm.nih.gov/mesh/2026/D044704
  2. A-Form DNA. In: Wikipedia. https://en.wikipedia.org/wiki/A-DNA
  3. A-Form DNA. In: Wikidata. https://www.wikidata.org/wiki/Q2360205