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相关概念视频

Conjugated Proteins02:50

Conjugated Proteins

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Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
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Plastic Deformations of Members with a Single Plane of Symmetry01:21

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When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
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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...
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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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Updated: Jan 30, 2026

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
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在功能化塑料表面上进行DNA结合,以进行顺序的,代的单分子测序.

Sharmili Roy1, Hanlee P Ji2, Billy T Lau3

  • 1Division of Oncology, Department of Medicine, Stanford University School of Medicine, CCSR 1115, 269 Campus Drive, Stanford, CA, 94305-5151, USA.

Scientific reports
|January 28, 2026
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的DNA存储方法,使用点击化学来将DNA附着在塑料表面上. 这使得重复的,非破坏性的数据检索和测序成为可能,RPA显示出比PCR更优异的性能.

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科学领域:

  • 生物技术是生物技术.
  • 材料科学 材料科学 材料科学
  • 分子生物学分子生物学

背景情况:

  • DNA提供了高密度数据存储潜力.
  • 目前用于检索DNA的方法可能是破坏性的或低效的.
  • 需要稳定,可重复使用的DNA数据存储系统.

研究的目的:

  • 开发一种反复和顺序检索任意DNA元素的方法.
  • 为了创建一个强大的,基于塑料的DNA存储介质.
  • 为了比较PCR和复合酶聚合酶放大 (RPA) 进行DNA检索.

主要方法:

  • 通过点击化学,将带有跨环氧 octene (TCO) 的合成 DNA 结合到用甲基四甲 (MTz) 功能化的塑料表面.
  • 使用基于聚合酶的放大 (PCR和RPA) 进行DNA检索.
  • 描述DNA结合过程,动力学,并在多个检索周期中进行放大和测序.

主要成果:

  • 证明了对塑料表面的共价DNA附着,使得重复的,非破坏性的放大.
  • 从同一表面多次成功地检索和测序特定的DNA数据元素.
  • 与PCR相比,RPA表现出更好的性能指标,包括减少污染和提高产量.

结论:

  • 开发了一种基于塑料的DNA存储系统,用于强大的,代的,有针对性的DNA检索.
  • 点击化学方法允许稳定,长期的DNA数据存储.
  • RPA是一种更适合的放大方法,用于从该存储系统中顺序检索DNA数据.