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相关概念视频

Oxygen Requirements and Growth Patterns01:29

Oxygen Requirements and Growth Patterns

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Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
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The Resting Membrane Potential01:21

The Resting Membrane Potential

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Overview
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Resting Membrane Potential01:24

Resting Membrane Potential

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The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
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Requirements for Human Life01:26

Requirements for Human Life

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The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
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Proteins: Dietary Sources and Requirements01:28

Proteins: Dietary Sources and Requirements

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Consuming animal-based products offers high-quality proteins that contain optimal levels and combinations of essential amino acids, crucial for tissue repair and growth. Foods like eggs, milk, fish, and most meats are a source of complete proteins. Legumes and cereals are abundant in proteins; however, they typically lack a full range of essential amino acids. As a result, they are considered incomplete protein sources. Some plant sources like soybeans, quinoa, and amaranth do contain complete...
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Carbohydrates: Dietary Sources and Requirements01:15

Carbohydrates: Dietary Sources and Requirements

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Carbohydrates are predominantly obtained from plant sources. With the exception of lactose found in milk and insignificant glycogen amounts in meat, most consumed carbohydrates have plant origins. Monosaccharides and disaccharides, or sugars, can be sourced from fruits, honey, milk, sugar cane, and sugar beets. Grains and vegetables are rich in the polysaccharide starch. Two types of polysaccharides provide fiber: cellulose, which is abundant in many vegetables, forms undigestible roughage or...
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相关实验视频

Updated: Feb 5, 2026

A Fluorescence-Based Assay of Membrane Potential for High-Throughput Functional Study of Two Endogenous Ion Channels in Two Epithelial Cell Lines
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A Fluorescence-Based Assay of Membrane Potential for High-Throughput Functional Study of Two Endogenous Ion Channels in Two Epithelial Cell Lines

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膜潜力是MURJ功能所需的

Frederick A Rubino1, Sujeet Kumar2, Natividad Ruiz2

  • 1Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States.

Journal of the American Chemical Society
|March 21, 2018
PubMed
概括
此摘要是机器生成的。

针对MurJ (一种翻转酶) 的新抗生素对格拉姆阴性感染至关重要. 研究人员开发了一种新的测定方法,通过测量脂质II积累来量化MurJ抑制,从而帮助抗生素的开发.

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Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases
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Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases

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相关实验视频

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A Fluorescence-Based Assay of Membrane Potential for High-Throughput Functional Study of Two Endogenous Ion Channels in Two Epithelial Cell Lines
06:59

A Fluorescence-Based Assay of Membrane Potential for High-Throughput Functional Study of Two Endogenous Ion Channels in Two Epithelial Cell Lines

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Imaging Membrane Potential with Two Types of Genetically Encoded Fluorescent Voltage Sensors
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Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases

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科学领域:

  • 微生物学
  • 生物化学
  • 药物发现

背景情况:

  • MurJ是一种细菌转基因,对输出细胞壁的关键成分脂质II至关重要.
  • 开发新的抗生素来对抗阴性细菌是一个急需的医疗需求.
  • 由于运输过程中缺乏基质化学变化,现有的量化MurJ活性方法是有限的.

研究的目的:

  • 开发一种用于监测MurJ翻酶活性的定量试验.
  • 为了确定抑制MurJ功能的条件和化合物.
  • 了解MurJ因抑制而发生的形状变化.

主要方法:

  • 使用生物素标记策略量化细胞内脂质II的积累,以测量MurJ抑制.
  • 该试验用于测试膜电位对MurJ活性的影响.
  • 进行了氨酸可访问性探测,以分析MurJ构造.

主要成果:

  • 通过测量细胞内脂质II积累,一项新型试验成功量化了MurJ抑制.
  • 通过分散膜潜力的化合物抑制了MurJ活动.
  • 在膜电位消散下的抑制导致MurJ采用非活跃的,面向外的形状.

结论:

  • 在大肠杆菌中,膜潜能对MurJ功能至关重要.
  • 开发的试验允许量化MurJ抑制剂.
  • 不活跃的,面向外的MurJ构造为新型抗生素设计提供了一个结构性目标.