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Phylogenetic Trees03:21

Phylogenetic Trees

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Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
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Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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Conservation of Protein Domains Over Different Proteins02:26

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
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Conservation of Protein Domains02:26

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Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
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Per-Unit Sequence Models01:26

Per-Unit Sequence Models

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An ideal Y-Y transformer, grounded through neutral impedances, displays per-unit sequence networks akin to those of a single-phase ideal transformer when subjected to balanced positive- or negative-sequence currents. These currents do not produce neutral currents, and their associated voltage drops.
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...
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Updated: Feb 19, 2026

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樹木構造のオーンシュタイン-ウレンベック変異型オートエンコーダを使用した祖先のタンパク質配列の再構築.

Lys Sanz Moreta1, Jotun Hein2, Thomas Hamelryck3

  • 1Probabilistic programming group, PLTC Section, University of Copenhagen, Copenhagen, Denmark.

... International Conference on Learning Representations
|February 18, 2026
PubMed
まとめ
この要約は機械生成です。

この研究は,生物学的配列分析のための進化を明示的に表す新しい深層生成モデルを提示しています. このアプローチは,生物情報学における祖先の配列再構築と表現学習を強化します.

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科学分野:

  • バイオインフォマティックス
  • コンピュータ生物学 コンピュータ生物学
  • 進化生物学の進化生物学について

背景:

  • 生物学的配列表現の現在のモデルは,しばしば明白な進化のダイナミクスを無視しています.
  • 進化過程を理解することは,正確な生物学的配列分析と再構築に不可欠です.

研究 の 目的:

  • 進化的情報を組み込む新しい深層生成モデルを導入する.
  • 生物学的シーケンスの表現学習と祖先のシーケンスの再構築を改善するために.

主な方法:

  • 樹木構造のオーンシュタイン-ウレンベックプロセスを利用した深層生成モデルの開発.
  • 変数型オートエンコーダーに情報を与えるために,系統樹の統合.
  • タンパク質ファミリーの祖先配列再構築タスクへの適用.

主要な成果:

  • このモデルは,祖先の配列再構築において強力なパフォーマンスを示しています.
  • アブレーション研究は,進化を明示的にモデル化することの利点を確認しています.
  • ツリー構造のPriorは,表現学習を大幅に強化します.

結論:

  • ツリー構造の priors を使用して進化過程を明示的にモデリングすることは,生物学的配列表現学習の実質的な改善を提供します.
  • このモデルは,ゲノミクスと潜在的系統遺伝的推論の応用が有望であることを示しています.