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相关概念视频

Non-LTR Retrotransposons03:18

Non-LTR Retrotransposons

13.1K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
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Overview of Transposition and Recombination02:13

Overview of Transposition and Recombination

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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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LTR Retrotransposons03:08

LTR Retrotransposons

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LTR retrotransposons are class I transposable elements with long terminal repeats flanking an internal coding region. These elements are less abundant in mammals compared to other class I transposable elements. About 8 percent of human genomic DNA comprises LTR retrotransposons. Some of the common examples of LTR retrotransposons are Ty elements in yeast and Copia elements in Drosophila.
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
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Somatic to iPS Cell Reprogramming01:29

Somatic to iPS Cell Reprogramming

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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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相关实验视频

Updated: Jan 10, 2026

An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
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An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues

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多平台框架用于在人体组织中绘制体质逆转换的映射.

Seunghyun Wang1,2,3, Mingyun Bae1,2,3, Jinhao Wang4,3

  • 1Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA.

bioRxiv : the preprint server for biology
|November 24, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的框架,用于绘制体细胞中罕见的移动元素插入 (MEI) 地图. 这种方法改善了这些基因组变化的检测,为人类基因组多样性提供了新的见解.

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Detection of Retrotransposition Activity of Hot LINE-1s by Long-Distance Inverse PCR
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Detection of Retrotransposition Activity of Hot LINE-1s by Long-Distance Inverse PCR

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Detecting Somatic Genetic Alterations in Tumor Specimens by Exon Capture and Massively Parallel Sequencing
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相关实验视频

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An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
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An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues

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Detection of Retrotransposition Activity of Hot LINE-1s by Long-Distance Inverse PCR
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Detection of Retrotransposition Activity of Hot LINE-1s by Long-Distance Inverse PCR

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Detecting Somatic Genetic Alterations in Tumor Specimens by Exon Capture and Massively Parallel Sequencing
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科学领域:

  • 基因组学就是基因组学.
  • 分子生物学分子生物学
  • 人类遗传学 人类遗传学

背景情况:

  • 移动元素插入 (MEI) 显著影响人类基因组的生殖和体组织.
  • 在非癌性组织中检测体质MEI (sMEI) 很困难,原因是低等位基因分数和重复的基因组区域.

研究的目的:

  • 建立一个先进的分析框架,用于准确的SMEI检测和表征.
  • 增强对sMEI动态及其对基因组结构和进化影响的理解.

主要方法:

  • 使用了长读测序,MEI向测序和先进生物信息学的组合.
  • 实施了哈普洛型分阶段和特定于供体的组件,以改善sMEI分辨率.
  • 开发了一种基于内部序列变化的新型源追踪策略.

主要成果:

  • 基准sMEI检测方法,强调长读和针对性测序对低频事件的有效性.
  • 成功地区分了中小企业与生殖线插入和体中的工件.
  • 在捐赠组织中发现了18个罕见的体质L1插入,揭示了显著的结构和来源多样性.

结论:

  • 开发的框架提供了一个强大的方法,用于在各种人体组织中绘制中小企业的地图.
  • 这项研究扩大了已知的活跃移动元素的范围,并提供了对体质基因组变异的关键生物学见解.