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Related Concept Videos

Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...

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Related Experiment Video

Updated: Jun 4, 2026

Tracking Single Proteins in Lipid Bilayers Using Fluorescence Microscopy
08:39

Tracking Single Proteins in Lipid Bilayers Using Fluorescence Microscopy

Published on: December 12, 2025

Probing protein-membrane interactions using solid supported membranes.

Ann Junghans1, Chloé Champagne, Philippe Cayot

  • 1Max Planck Institute for Polymer Research, Mainz, Germany.

Langmuir : the ACS Journal of Surfaces and Colloids
|February 16, 2011
PubMed
Summary
This summary is machine-generated.

Tethered bilayer lipid membranes reveal how whey protein β-lactoglobulin interacts with lipid interfaces. Understanding these lipid-protein interactions is key for food and cosmetic applications, influencing emulsion stabilization and gelification.

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Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro
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Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro

Published on: August 14, 2011

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Last Updated: Jun 4, 2026

Tracking Single Proteins in Lipid Bilayers Using Fluorescence Microscopy
08:39

Tracking Single Proteins in Lipid Bilayers Using Fluorescence Microscopy

Published on: December 12, 2025

Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro
08:38

Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro

Published on: August 14, 2011

Area of Science:

  • Biophysics
  • Food Science
  • Cosmetic Science

Background:

  • Lipid-protein interactions are crucial for emulsion stabilization and gelification in food and cosmetic products.
  • Tethered bilayer lipid membranes (tBLMs) serve as a model to study these interfacial phenomena.
  • Whey protein β-lactoglobulin (BLG) is a common protein with significant interfacial activity.

Purpose of the Study:

  • To investigate the interfacial behavior and interactions of β-lactoglobulin (BLG) with lipid membranes.
  • To understand how protein structure influences its adsorption and organization at the lipid interface.
  • To assess the relevance of these interactions for food and cosmetic applications.

Main Methods:

  • Utilized tethered bilayer lipid membranes (tBLMs) as a model system.
  • Employed surface plasmon spectroscopy (SPS) to monitor adsorption.
  • Used neutron reflectivity (NR) to determine layer structure.
  • Applied electrochemical impedance spectroscopy (EIS) for interfacial characterization.

Main Results:

  • BLG interacts with lipid interfaces, forming layers whose packing density depends on protein structure.
  • Partially unfolded BLG forms more loosely packed layers compared to native BLG.
  • Lipid composition and protein structural properties significantly influence the observed interactions.

Conclusions:

  • The study provides insights into BLG-lipid interactions at interfaces, relevant to food and cosmetic formulations.
  • tBLMs are effective for studying interfacial lipid-protein dynamics.
  • Controlling protein structure and lipid composition can modulate interfacial behavior for targeted applications.