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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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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Nanoscale patterning of solid-supported membranes by integrated diffusion barriers.

Mathieu Jung1, Nicolas Vogel, Ingo Köper

  • 1Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.

Langmuir : the ACS Journal of Surfaces and Colloids
|April 28, 2011
PubMed
Summary
This summary is machine-generated.

Researchers created patterned lipid bilayer membranes using nanostructured substrates. These membranes feature polymerizable lipids that act as diffusion barriers, enabling control over membrane fluidity and the creation of isolated membrane corrals for advanced applications.

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Area of Science:

  • Biophysics
  • Materials Science
  • Nanotechnology

Background:

  • Solid-supported lipid bilayers mimic cellular membranes.
  • Controlling membrane properties is crucial for biological studies and biosensors.
  • Existing methods for patterning membranes have limitations.

Purpose of the Study:

  • To develop a method for creating patterned solid-supported bilayer membranes with tunable diffusion barriers.
  • To investigate the use of polymerizable lipids as diffusion barriers within phospholipid bilayers.
  • To demonstrate the creation of isolated membrane corrals and control lipid diffusion.

Main Methods:

  • Utilized ultraflat nanostructured substrates as templates.
  • Employed nanosphere lithography to pattern templates.
  • Incorporated polymerizable tethered lipids to form diffusion barriers.
  • Characterized 100 nm patterns and lipid diffusion coefficients.

Main Results:

  • Successfully produced patterned solid-supported bilayer membranes with 100 nm features.
  • Demonstrated that polymerizable lipids effectively act as diffusion barriers.
  • Controlled lipid diffusion coefficients to levels comparable to cellular membranes.
  • Created isolated fluid membrane patches using colloidal masks.

Conclusions:

  • Developed a novel method for fabricating patterned lipid bilayers with embedded diffusion barriers.
  • The system allows for precise control over membrane fluidity and compartmentalization.
  • This platform has significant potential for studying cellular processes and developing biosensor arrays.