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Nucleic acid double helix

In molecular biology, the double helix is the structure formed by double-stranded molecules of nucleic acids such as DNA. The double-helical structure of a nucleic acid complex arises as a consequence of its secondary structure, and is a fundamental component in determining its tertiary structure.

History, Helix geometries & Bending

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Overview

History

Nucleic acid hybridization

Helix geometries

Bending

Stretching

Supercoiling and topology

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Map overview Semantic statistics

Nucleic acid double helix

Nodes84
Edges83
Triples9
Avg. degree1.98
Density0.02381
Components1

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Important terminology

dna base structure helix minor double bending pairs one strands molecule molecules major groove b-dna length number nucleic axis form

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
DNAinstance ofthe double helix is the structure formed by double-stranded molecules of nucleic acids0.80text
TATA at the start of many genes to assist RNA polymerase in melting the DNA for transcription.Strand separation by gentle heatinginstance ofThese mechanical features are reflected by the use of sequences0.80text
as used in polymerase chain reactioninstance ofThese mechanical features are reflected by the use of sequences0.80text
DNA polymeraseinstance ofHelicases unwind the strands to facilitate the advance of sequence-reading enzymes0.80text
the G-quadruplexinstance ofThere are also triple-stranded DNA forms and quadruplex forms0.80text
the i-motif.GroovesTwin helical strands form the DNA backboneinstance ofThere are also triple-stranded DNA forms and quadruplex forms0.80text
X-ray crystallography of DNA duplexesinstance ofthe models were set aside in favor of the double-helical model due to subsequent experimental advances0.80text
later the nucleosome core particleinstance ofthe models were set aside in favor of the double-helical model due to subsequent experimental advances0.80text
and the discovery of topoisomerasesinstance ofthe models were set aside in favor of the double-helical model due to subsequent experimental advances0.80text

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