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関連する概念動画

The Fluid Mosaic Model01:34

The Fluid Mosaic Model

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The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
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Histone Variants at the Centromere02:30

Histone Variants at the Centromere

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Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
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Fluid Mosaic Model01:19

Fluid Mosaic Model

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Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich...
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Principles of Pharmacogenetics: Types of Genetic Variants01:27

Principles of Pharmacogenetics: Types of Genetic Variants

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The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
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Position-effect Variegation02:32

Position-effect Variegation

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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
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Histone Modification02:32

Histone Modification

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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
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A Scalable, Cell-Based Method for the Functional Assessment of Ube3a Variants
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DRAGENを使用してスケーラブルで包括的なモザイク変数呼び出しを使用しています.

Sairam Behera, Massimiliano Rossi, Yina Wang

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    PubMed
    まとめ
    この要約は機械生成です。

    低変異アレル分数 (VAF) モザイク変異の検出は,DRAGENモザイクコールで実現可能になりました. このハードウェア加速ツールは,正確な検出のために1時間スケールの実行時間を達成し,モザイク変異に関する新しい洞察を可能にします.

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    Direct Agroinoculation of Maize Seedlings by Injection with Recombinant Foxtail Mosaic Virus and Sugarcane Mosaic Virus Infectious Clones
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    科学分野:

    • ゲノミクスゲノミクスとは
    • コンピュータ生物学 コンピュータ生物学
    • 分子生物学は分子生物学である.

    背景:

    • コントロールなしで低変異アレル分数 (VAF) モザイク変異を検出することは,技術的なノイズとスケーラビリティの問題のために困難です.
    • 既存の方法は,堅牢なベンチマークがなく,低VAF検出のための計算効率に苦労しています.

    研究 の 目的:

    • 低VAFのモザイク変数の正確かつスケーラブルな検出のためのハードウェア加速方法を開発する.
    • 低VAF変異の呼び出しを評価するための全ゲノムベンチマークを確立する.
    • 人間の組織におけるモザイク変異パターンを調査し,以前に特定されたモザイク変異の起源を評価する.

    主な方法:

    • 単一ヌクレオチド変種 (SNV) とインデルの検出のためのハードウェア加速ツールであるDRAGENモザイクカラーの開発.
    • VAFの1-10%の範囲の変異のゲノム全体の基準データセットの作成.
    • 血液,精子,脳組織からの大量配列データへの呼び出し者の適用.
    • パーソナライズされたアセンブリ・パンゲノム参照を利用して,複雑なゲノム領域でのアラインメントを改善します.

    主要な成果:

    • DRAGENモザイクコール機は,低偽陽性率と1時間スケールの実行時間を持つ1~2%のVAFまで変種を識別します.
    • 低VAF変異 (1-10%) の新しい全ゲノムベンチマークが導入されました.
    • HG002の血液の分析により,細胞系における以前に特定された多くのモザイク変種が,培養由来である可能性があることが明らかになった.
    • モザイクホットスポットと突然変異のサインは,異なる組織にわたって特定されました.
    • パーソナライズされたパンゲノム参照は,複雑なゲノム領域での変異検出を強化しました.

    結論:

    • DRAGENモザイクコール器は,低VAFのモザイク変種を日常的に発見することを可能にします.
    • この進歩は,健康な個体と病気の個体の両方でモザイク変異を研究するための新しい道を開きます.
    • この発見は, in vivo 変異を培養物から区別することの重要性を強調しています.