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Related Concept Videos

Membrane Fluidity01:26

Membrane Fluidity

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 a relatively...
Membrane Fluidity01:23

Membrane Fluidity

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.Fatty acids tails of phospholipids can be either saturated or...
Membrane Domains01:18

Membrane Domains

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 anterior...
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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 cytoskeletal...
Mechanism of Lamellipodia Formation01:31

Mechanism of Lamellipodia Formation

Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...

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Related Experiment Video

Updated: Jun 7, 2026

Extracellular Vesicle Tissue Factor Activity Assay
03:53

Extracellular Vesicle Tissue Factor Activity Assay

Published on: December 29, 2023

Tissue factor, lipid rafts, and microparticles.

Pavel Davizon1, Adam D Munday, José A López

  • 1Research Division, Puget Sound Blood Center, Seattle, Washington 98104, USA.

Seminars in Thrombosis and Hemostasis
|November 5, 2010
PubMed
Summary

Microparticles, including those with tissue factor, originate from lipid rafts in cell membranes. Understanding this origin is key to managing their harmful biological and medical effects.

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Last Updated: Jun 7, 2026

Extracellular Vesicle Tissue Factor Activity Assay
03:53

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Published on: December 29, 2023

Flow Cytometry Analysis of Tissue Factor Expression in Human Platelets
10:08

Flow Cytometry Analysis of Tissue Factor Expression in Human Platelets

Published on: November 22, 2024

Nanopodia - Thin, Fragile Membrane Projections with Roles in Cell Movement and Intercellular Interactions
10:50

Nanopodia - Thin, Fragile Membrane Projections with Roles in Cell Movement and Intercellular Interactions

Published on: April 3, 2014

Area of Science:

  • Cell Biology
  • Biochemistry
  • Biomedical Science

Background:

  • Microparticles are cell-derived vesicles implicated in various biological processes.
  • Tissue-factor-bearing microparticles play roles in hemostasis and thrombosis.
  • The origin of microparticles from specific membrane domains is an area of active research.

Purpose of the Study:

  • To review the evidence supporting the origin of microparticles from lipid rafts.
  • To discuss the implications of lipid raft origins for microparticle function.
  • To explore therapeutic strategies targeting microparticle production.

Main Methods:

  • Literature review of studies on microparticle biogenesis.
  • Analysis of evidence linking lipid rafts to microparticle formation.
  • Synthesis of findings on the biological and medical relevance of raft-derived microparticles.

Main Results:

  • Emerging evidence suggests microparticles, including those expressing tissue factor, originate from lipid raft-rich membrane regions.
  • Lipid raft association influences the composition and biological activity of microparticles.
  • The raft origin model provides a framework for understanding microparticle-mediated pathology.

Conclusions:

  • Microparticle biogenesis is closely linked to the unique properties of lipid rafts.
  • Targeting lipid raft pathways may offer novel therapeutic approaches to control harmful microparticle production.
  • Further research into raft-microparticle interactions is crucial for clinical applications.