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相关概念视频

Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

2.6K
The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
2.6K
Membrane Fluidity01:23

Membrane Fluidity

151.3K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
151.3K
Membrane Domains01:18

Membrane Domains

5.3K
The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
5.3K
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

3.0K
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
3.0K
Fluid Mosaic Model01:19

Fluid Mosaic Model

11.5K
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...
11.5K
The Fluid Mosaic Model01:34

The Fluid Mosaic Model

145.4K
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.
145.4K

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相关实验视频

Updated: Jun 8, 2025

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
10:49

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Published on: March 5, 2017

13.2K

映射膜生物物理纳米环境.

Luca Panconi1,2,3, Jonas Euchner3,4,5, Stanimir A Tashev3,4,5

  • 1Department of Immunology and Immunotherapy, School of Infection, Inflammation and Immunology, College of Medicine and Health, University of Birmingham, Birmingham, UK.

Nature communications
|November 7, 2024
PubMed
概括
此摘要是机器生成的。

我们开发了一种使用先进显微镜和拓数据分析的新方法,用于绘制细胞中纳米级膜域的地图. 这项技术可在纳米尺度上可视化脂质环境,克服了以前的分辨率限制.

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Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
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Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis

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Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
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Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

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相关实验视频

Last Updated: Jun 8, 2025

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
10:49

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Published on: March 5, 2017

13.2K
Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
07:31

Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis

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Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
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Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

Published on: May 27, 2021

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科学领域:

  • 细胞生物学 细胞生物学
  • 生物物理学的生物物理.
  • 显微镜的使用方法

背景情况:

  • 哺乳动物的血膜具有具有独特属性的脂质域.
  • 研究这些领域是具有挑战性的,因为它们的规模很小,与散装膜相似,通常低于光学显微镜分辨率.

研究的目的:

  • 开发和验证一种用于绘制纳米级膜领域的方法.
  • 在纳米分辨率下可视化和量化等离子体膜内的脂质环境.

主要方法:

  • 使用了solvatochromic探针di-4-ANEPPDHQ,它根据环境改变光发射.
  • 采用光谱分辨率的单分子定位显微镜 (SR-SMLM).
  • 开发了基于拓数据分析 (PLASMA) 的量化算法,用于标记点模式数据.

主要成果:

  • 在人工膜和活细胞中成功地绘制了纳米域的地图,精确度为纳米.
  • 证明了能够评估膜性质的变化,以应对外部干扰 (例如,甲基-β-环氧).
  • 创建了结合本地化坐标和通用偏振值的标记点模式.

结论:

  • 综合方法提供了一个新的工具集,用于纳米尺度地图的膜特性.
  • 这种方法克服了传统光学显微镜在研究膜领域的分辨率限制.
  • 允许详细调查膜异质性和动态.