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相关概念视频

The DNA Helix01:16

The DNA Helix

Overview
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,
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...
Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...

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相关实验视频

Updated: Jul 9, 2026

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1
11:25

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1

Published on: March 18, 2017

通过部分组合选择选择的G-quadruplex特异性-hemicyanine连接体.

James A Schouten1, Sylvain Ladame, Stephen J Mason

  • 1University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.

Journal of the American Chemical Society
|May 8, 2003
PubMed
概括

研究人员通过将四分与半氨酸支架结合起来,开发出了新的G-四重复DNA连接体. 这些连接体对G-四重复DNA具有较高的亲和力和选择性,而不是双重复DNA结构.

科学领域:

  • 药用化学 医学化学
  • 分子生物学分子生物学
  • 生物化学 生物化学

背景情况:

  • G-四重复的DNA结构是独特的核酸图案,涉及到各种生物过程.
  • 开发G-四重复DNA的选择性配体对于治疗和诊断应用至关重要.
  • 现有的连接体往往缺乏足够的亲和力或特异性对G-四重复DNA.

研究的目的:

  • 设计和合成新的G-四重复DNA特异性配体.
  • 为了增强基于的配体的结合亲和力和选择性.
  • 探索半氨酸支架在G-四重复DNA识别中的实用性.

主要方法:

  • 组合选择的四甲.
  • 选择的四甲的结合,以形成一个半氨酸支架.
  • 对G-四重复DNA与双重复DNA的亲和性和选择性测定.

主要成果:

  • 生成的四聚胺 - 氨酸合物作为G-四重复的DNA连接体.
  • 在结亲和力中实现了大约1000倍的增强.
  • 对于G-四重复DNA,已经显示出接近微分子的亲和力.
  • 显示四重复 DNA 与双重复 DNA 的区别大于 40 倍.

更多相关视频

In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines
05:32

In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines

Published on: May 12, 2023

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
05:37

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes

Published on: April 4, 2025

相关实验视频

Last Updated: Jul 9, 2026

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1
11:25

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1

Published on: March 18, 2017

In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines
05:32

In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines

Published on: May 12, 2023

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
05:37

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes

Published on: April 4, 2025

结论:

  • 开发出来的四聚胺 - - 氨酸连接体对G-四重复DNA具有很高的亲和力和选择性.
  • 半氨酸支架显著增强了的结合性质.
  • 这些配体代表了在生物系统中准G-四重复DNA的有希望的候选人.