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相关概念视频

Labeling DNA Probes03:31

Labeling DNA Probes

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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
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相关实验视频

Updated: Aug 4, 2025

Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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用于多重成像的光消灭光探针 (FLASH-Off)

Elias A Halabi1, Ralph Weissleder1,2

  • 1Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge St, CPZN 5206, Boston, Massachusetts 02114, United States.

Journal of the American Chemical Society
|April 5, 2023
PubMed
概括

研究人员开发了用于循环成像的可光切换光探测器. 这些探针可以在不需要洗的情况下快速,可控的光灭,从而改善了疾病生物学研究.

科学领域:

  • 生物医学成像
  • 分子生物学
  • 化学生物学

背景情况:

  • 循环光成像对于理解复杂疾病至关重要.
  • 现有的循环方法面临长时间火和大量洗等局限性.

研究的目的:

  • 在循环成像中开发新型色素以实现高效和快速的光灭.
  • 克服目前循环成像技术的局限性.

主要方法:

  • 合成新型色素,使用光焚烧式三链接剂.
  • 使用单个紫外线光脉冲 (405 nm) 来使探头失活.
  • 通过抗体结合物和分子内螺旋循环证明光灭.

主要成果:

  • 新的色素可以通过单一的光脉冲有效地失活.
  • 在不需要洗或外源化学物质的情况下,光会快速关闭.
  • 探测器在活体和固定样本中表现出快速,可控和生物相容的性能.

结论:

  • 可光切换的色素在循环光成像方面具有显著的优势.
  • 这些探测器可以精确地控制光发射.

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  • 开发的技术在研究疾病生物学和进化方面具有广泛的应用.