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相关概念视频

Phylogenetic Trees03:21

Phylogenetic Trees

50.2K
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...
7.1K
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

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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

Conservation of Protein Domains

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4.2K
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...
4.9K
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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相关实验视频

Updated: Feb 19, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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使用树结构的奥恩斯坦-乌伦贝克变异自编码器重建祖先蛋白序列.

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
概括

这项研究提出了一个新的深度生成模型,该模型明确地代表了生物序列分析的进化. 这种方法增强了生物信息学中的祖先序列重建和表示学习.

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科学领域:

  • 生物信息学是一种生物信息学.
  • 计算生物学 计算生物学
  • 进化生物学 进化生物学

背景情况:

  • 目前用于生物序列表示的模型往往忽视了明确的进化动态.
  • 了解进化过程对于准确的生物序列分析和重建至关重要.

研究的目的:

  • 引入一种包含进化信息的新型深度生成模型.
  • 改进对生物序列的表示学习和祖先序列重建.

主要方法:

  • 使用树结构的奥恩斯坦-乌伦贝克过程开发一个深度生成模型.
  • 整合一个家族遗传树来告知一个变异自编码器.
  • 适用于蛋白质家族的祖先序列重建任务.

主要成果:

  • 该模型在祖先序列重建中表现出强的性能.
  • 废除研究证实了明确建模进化的好处.
  • 树结构的前期显著增强了表示学习.

结论:

  • 使用树结构的先验来明确建模进化过程,在生物序列表示学习中提供了实质性的改进.
  • 该模型对基因组学和潜在的遗传学推断的应用具有前景.