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The Mechanics of (Poro-)Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton08:50

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In this work, an in vitro reconstitution approach is employed to study the poroelasticity of actomyosin gels under controlled conditions. The dynamics of the actomyosin gel and the embedded solvent are quantified, through which the network poroelasticity is demonstrated. We also discuss the experimental challenges, common pitfalls, and relevance to cell cytoskeleton...
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Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix09:13

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This protocol presents a method to perform rheology characterization of mucus that resides on gill rakers (GRs) of the silver carp. Viscoelastic characteristics of GR-mucus, obtained by measuring viscosity, storage and loss moduli, are evaluated for the apparent yield stress to understand the filter feeding mechanism in...
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The Diffusion of Passive Tracers in Laminar Shear Flow08:01

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Updated: Jan 12, 2026

Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix
09:13

Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix

Published on: July 10, 2020

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敌对的共同进化加速了分子进化.

Steve Paterson1, Tom Vogwill, Angus Buckling

  • 1School of Biological Sciences, Biosciences Building, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK.

Nature
|February 26, 2010
PubMed
概括
此摘要是机器生成的。

像宿主和寄生虫一样,物种之间的对抗性共同进化加速了分子进化. 这项研究经验证明,同进化菌体的进化速度更快,并且比具有恒定宿主的菌体有更大的遗传分歧.

更多相关视频

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

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相关实验视频

Last Updated: Jan 12, 2026

Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix
09:13

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Published on: July 10, 2020

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Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

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科学领域:

  • 进化生物学是进化的生物学.
  • 微生物基因组学 微生物基因组学
  • 共同进化的动态.

背景情况:

  • 红皇后假设认为,物种必须不断地适应和反适应才能生存.
  • 红皇后假设的经验证据是有限的,因为共同进化研究需要很长的时间表.

研究的目的:

  • 通过检查共同进化的宿主-寄生虫系统中的分子进化速率来经验性地测试红皇后假说.
  • 为了研究对抗性共同进化的影响,在细菌菌菌体系统中的分子进化的速度和模式.

主要方法:

  • 使用 Pseudomonas fluorescens SBW25 种群及其菌体 Phi2.2 的实验进化.
  • 将与共同进化的宿主进化的菌体与恒定的宿主基因型的分子进化速率进行比较.
  • 分析进化菌种群的遗传分歧和宿主感染范围.

主要成果:

  • 与细菌共同进化时,相对于与恒定宿主共同进化时,菌分子进化率显著更高.
  • 同进化导致了复制菌体种群之间的更大的遗传分歧.
  • 遗传分歧的程度与共同进化的菌体可以感染的宿主范围相关.
  • 参与宿主感染的基因在共同进化的压力下表现出最快的进化.

结论:

  • 敌对的共同进化是基因组和表型层面上快速和分歧的分子进化的重要驱动因素.
  • 这项研究为微生物系统中的红皇后假设提供了直接的经验支持.
  • 同进化动态对于理解物种内部的进化变化至关重要.