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関連する概念動画

DNA Base Pairing02:27

DNA Base Pairing

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
DNA Base Pairing02:27

DNA Base Pairing

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
DNA Helicases00:55

DNA Helicases

DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
DNA Topoisomerases02:02

DNA Topoisomerases

Topoisomerases are enzymes that relax overwound DNA molecules during various cell processes, including DNA replication and transcription. These enzymes regulate positive and negative DNA supercoiling without changing the nucleotide sequence. DNA overwinding in a clockwise direction results in positively supercoiled DNA, whereas underwinding in a counterclockwise direction produces negatively supercoiled DNA.
Types and Mechanism of action
Topoisomerases are divided into two main types.  Type I...
DNA-only Transposons02:57

DNA-only Transposons

DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...

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Updated: Jun 24, 2026

Associated Chromosome Trap for Identifying Long-range DNA Interactions
14:49

Associated Chromosome Trap for Identifying Long-range DNA Interactions

Published on: April 23, 2011

DNAの近接誘発超伝導性は,DNAの近接誘発超伝導性である.

A Y Kasumov1, M Kociak, S Guéron

  • 1Laboratoire de Physique des Solides, Associé au CNRS, Bât 510, Université Paris-Sud, 91405, Orsay, France.

Science (New York, N.Y.)
|February 24, 2001
PubMed
まとめ
この要約は機械生成です。

二重鎖DNAはオーム伝導率を1ケルビンまで示しています. DNA分子は,ミリケルビン温度でも,数百ナノメートル以上の相相相合性を維持し,分子ワイヤーとしての可能性を示唆しています.

さらに関連する動画

CD Spectroscopy to Study DNA-Protein Interactions
06:48

CD Spectroscopy to Study DNA-Protein Interactions

Published on: February 10, 2022

Spectroscopic Super-resolution Imaging of DNA Molecules using Intrinsic Contrast
09:19

Spectroscopic Super-resolution Imaging of DNA Molecules using Intrinsic Contrast

Published on: March 6, 2026

関連する実験動画

Last Updated: Jun 24, 2026

Associated Chromosome Trap for Identifying Long-range DNA Interactions
14:49

Associated Chromosome Trap for Identifying Long-range DNA Interactions

Published on: April 23, 2011

CD Spectroscopy to Study DNA-Protein Interactions
06:48

CD Spectroscopy to Study DNA-Protein Interactions

Published on: February 10, 2022

Spectroscopic Super-resolution Imaging of DNA Molecules using Intrinsic Contrast
09:19

Spectroscopic Super-resolution Imaging of DNA Molecules using Intrinsic Contrast

Published on: March 6, 2026

科学分野:

  • 分子電子は分子電子である.
  • 凝縮物質物理学 凝縮物質物理学
  • ナノテクノロジー ナノテクノロジー

背景:

  • DNAの電気的性質を理解することは,分子電子工学にとって極めて重要です.
  • 以前の研究では,さまざまな結果でDNA伝導性を調査しました.
  • 凍結温度でのDNAの振る舞いを調査することは,量子装置での応用に不可欠です.

研究 の 目的:

  • 低温で二重鎖DNA分子の伝導性を測定する.
  • 広い温度範囲でDNAのオームの行動と抵抗を決定する.
  • DNAの近接誘発超伝導性を調査する.

主な方法:

  • DNA分子は,コンビングプロセスを用いて,サブミクロンのスリートに収納されました.
  • 導電性測定は,レニウム/炭素の金属コンタクトの間で行われました.
  • 測定は室温から1ケルビンまで行われました.

主要な成果:

  • DNA伝導は,室温から1ケルビンまでの間,オム単位であることが判明しました.
  • DNA分子の抵抗は100キログラム未満で,温度の依存性は弱かった.
  • 接近誘発超伝導性は,コンタクトの超伝導的移行温度以下で観察されました.

結論:

  • DNA分子は,ミリケルビン温度まで電気を伝導することができます.
  • DNA分子では数百ナノメートルの間に相相相合性が維持される.
  • これらの発見は,冷凍電子機器のコンポーネントとしてのDNAの可能性を支持しています.