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関連する概念動画

RNA Editing02:23

RNA Editing

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RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
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Lineage Commitment01:21

Lineage Commitment

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Commitment is the  process whereby stem cells:
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Data Reporting and Recording01:24

Data Reporting and Recording

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Reporting and recording are crucial in data documentation. The timely, thorough, and accurate documentation of facts is essential when recording patient data. Failure to record findings during an assessment or interpretation of a problem will result in loss of information and make the patient document unreliable. The reader is left with general impressions if the information is not specific. A recording is documenting data of the individual's health information in a traceable, secure, and...
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CRISPR/Cas9 Genome Editing01:28

CRISPR/Cas9 Genome Editing

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The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
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The Fossil Record02:56

The Fossil Record

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The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
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Types of Records I: Unit and Nurses Records01:27

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 Unit records in healthcare settings document the patient's treatment history, including interventions, medications, diagnostic and laboratory results, progress notes, personal care needs, vital signs, and other medical information. They are crucial for managing patient care, aiding healthcare professionals in providing quality treatment and informed decision-making.
Unit records can be divided into two main types: administrative records and clinical records.
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再生ベースの編集により,深い系統の記録が可能になります.

Duncan M Chadly, Ron Hadas, Leslie Klock

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    まとめ

    この研究は,新しい分子記録システムであるハイパーカスケードを導入します. これは,変異率を一定に保ち,以前の方法の限界を克服することによって,深い系統の再構築を可能にします.

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    科学分野:

    • 分子生物学は分子生物学である.
    • 遺伝学 遺伝学とは
    • システム生物学 システム生物学

    背景:

    • 細胞系統の追跡は,発達と病気を理解するために不可欠です.
    • 既存の分子記録システムは,時間の経過とともに編集速度が低下するため,記録の深さの制限に直面しています.
    • 細胞系統の歴史の再構築は,遺伝性遺伝的バーコードに依存しています.

    研究 の 目的:

    • 深い系統の再構築のための再生性分子記録システムを開発する.
    • 現在のシステムにおけるエディティングレートの指数関数的に低下する制限を克服するために.
    • 高密度の情報保存と恒常的な変異の蓄積を可能にするために.

    主な方法:

    • 再生性分子記録ツールであるハイパーカスケードシステムの導入.
    • 予測可能なA-to-Gベースの編集を使用して,徐々に新しいターゲットサイトを作成します.
    • 編集可能なターゲットサイトの密度が高いシステムを設計する (20bpあたり4bp).

    主要な成果:

    • ハイパーカスケードは,およそ恒常的な突然変異の蓄積率を達成します.
    • 23日と~17世代を網羅した深い血統関係の再構築が実証されました.
    • シミュレーションは,クロマチンの状態動態の並列記録の可能性を示しています.

    結論:

    • ハイパーカスケードシステムは,細胞系統の再建の深さと精度を大幅に高めます.
    • この再生的なアプローチは,分子記録のための柔軟で広く適用可能なツールを提供します.
    • この技術は,前例のない解像度でダイナミックな生物学的プロセスを研究する見込みがある.