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Related Concept Videos

Membrane Domains01:18

Membrane Domains

6.2K
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...
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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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...
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Membrane Fluidity01:26

Membrane Fluidity

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Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
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Membrane Fluidity01:23

Membrane Fluidity

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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.
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Introduction to Membrane Traffic01:44

Introduction to Membrane Traffic

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The ER, Golgi apparatus, endosomes, and lysosomes work in tandem to modify, sort, and package proteins and lipids. An integrated membrane trafficking network facilitates the back and forth shuttling of molecules within different organelles in the same cell or across the cell membrane.
The transport of soluble and membrane proteins is mediated by transport vesicles that collect cargo from one cellular compartment and deliver it to another by fusing with the target organelle membrane. The Rab...
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Introduction to Membrane Traffic01:44

Introduction to Membrane Traffic

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Related Experiment Video

Updated: May 2, 2026

Single-Molecule Imaging of Lateral Mobility and Ion Channel Activity in Lipid Bilayers using Total Internal Reflection Fluorescence TIRF Microscopy
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Single-Molecule Imaging of Lateral Mobility and Ion Channel Activity in Lipid Bilayers using Total Internal Reflection Fluorescence TIRF Microscopy

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Membrane microdomains: from seeing to understanding.

Binh-An Truong-Quang1, Pierre-François Lenne1

  • 1Developmental Biology Institute of Marseilles, UMR 7288 CNRS, Aix-Marseille Université Marseille, France.

Frontiers in Plant Science
|March 7, 2014
PubMed
Summary

New optical microscopy techniques overcome the diffraction limit, enabling direct visualization and characterization of nanoscale membrane microdomains. These advancements enhance our understanding of cellular communication and mesoscopic membrane organization.

Keywords:
multiscale organizationplasma membrane microdomainsprotein clustersquantitative imagingsuppersolution

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

  • Cell Biology
  • Biophysics
  • Optical Microscopy

Background:

  • The plasma membrane acts as a semi-permeable barrier and communication interface.
  • Nanoscale organization of membrane microdomains is known but difficult to visualize optically.
  • The optical diffraction limit (~200 nm) has historically hindered direct observation of these heterogeneities.

Purpose of the Study:

  • To discuss emerging optical methods that overcome the diffraction limit.
  • To explain how these techniques enable direct visualization and quantitative characterization of nanoscopic membrane structures.
  • To explore the impact of these methods on understanding membrane microdomains and mesoscopic organization.

Main Methods:

  • Super-resolution optical microscopy techniques.
  • Methods that circumvent the optical diffraction limit.
  • Quantitative characterization of nanoscopic structures.

Main Results:

  • Emerging optical methods allow direct visualization of nanoscale membrane heterogeneities.
  • These techniques provide quantitative characterization of nanoscopic structures.
  • Refined knowledge of membrane microdomain organization.

Conclusions:

  • New optical methods are revolutionizing the study of plasma membrane organization.
  • These techniques offer insights into the basic principles of mesoscopic membrane organization.
  • Advancements in microscopy are crucial for understanding cellular functions at the nanoscale.