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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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Updated: May 20, 2025

Optimized Analysis of DNA Methylation and Gene Expression from Small, Anatomically-defined Areas of the Brain
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Optimized Analysis of DNA Methylation and Gene Expression from Small, Anatomically-defined Areas of the Brain

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研究单分子分子倒置探头用于中等规模的向DNA甲基化分析.

Roy B Simons1, Hieab H H Adams2, Manfred Kayser1

  • 1Department of Genetic Identification, Erasmus MC, University Medical Center Rotterdam, 3015 GD Rotterdam, The Netherlands.

Epigenomes
|March 26, 2025
PubMed
概括
此摘要是机器生成的。

单分子分子逆转探头 (smMIPs) 在分析低DNA输入的CpG甲基化方面表现有前途. 然而,目前的smMIP设计缺乏对二硫酸盐转化DNA的特异性和统一性.

关键词:
通过DNA甲基化.年龄预测预测.捕获捕获捕获捕获的捕获表观遗传学是指表观遗传学.挂锁探测器的探测器单分子分子逆转探测器独特的分子标识符 独特的分子标识符

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相关实验视频

Last Updated: May 20, 2025

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13:11

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科学领域:

  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
  • 分子生物学分子生物学
  • 生物技术是生物技术.

背景情况:

  • CpG甲基化是临床和法医应用中的关键表观遗传生物标志物.
  • 需要一种具有成本效益,灵敏的方法来进行中等规模的CpG分析,使用低DNA输入 (<10 ng).
  • 单分子分子逆转探头 (smMIPs) 正在探索对数百个CpG的同时分析.

研究的目的:

  • 调查smMIPs对分析数百个用户定义的CpG的实用性.
  • 开发一种新的smMIP设计工具 (Locksmith) 用于二硫酸盐转化DNA.
  • 为了优化smMIP捕获条件,进行敏感的甲基化分析.

主要方法:

  • 开发了一种新的smMIP设计工具 (Locksmith),适用于二硫酸盐转化DNA.
  • 通过单探头测试和全面板评估,优化smMIP捕获.
  • 多种混合/延长温度,smMIP/DNA量,dNTP度和延长时间.

主要成果:

  • 根据探针序列,捕获效率有很大差异,导致CpG覆盖范围异质.
  • 对于CpG具有≥20X覆盖率的CpG,实现了强大的甲基化检测,与EPIC微阵列分析 (r=0.96) 相似.
  • 在测试的smMIP小组中观察到低特异性和一致性.

结论:

  • 目前的smMIP设计表现出低特异性和与二硫酸盐转化DNA的统一性.
  • 目前的smMIPs不适合分析二硫酸盐转化DNA的复杂性降低.
  • 为了有效的表观遗传分析,需要进一步优化smMIP设计和协议.