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Related Experiment Videos

Solubilization of planar bilayers with detergent

G Csúcs1, J J Ramsden

  • 1Institute of Biochemistry, University of Zurich, Zurich, Switzerland.

Biochimica Et Biophysica Acta
|April 29, 1998
PubMed
Summary

Triton X-100 detergent interacts with lipid bilayers. Initially reversible, it later removes lipid and eventually solubilizes the bilayer, similar to lipid vesicles.

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Area of Science:

  • Biophysics
  • Materials Science

Background:

  • Supported lipid bilayers are crucial models for cell membranes.
  • Understanding detergent interactions is key to membrane biophysics.

Purpose of the Study:

  • To investigate the interaction between Triton X-100 and phosphatidylcholine lipid bilayers.
  • To characterize the stages of detergent incorporation and bilayer disruption.

Main Methods:

  • Optical waveguide lightmode spectroscopy (OWLS) was employed.
  • In situ monitoring of bilayer changes with high sensitivity and time resolution.

Main Results:

  • Triton X-100 incorporation into bilayers is concentration-dependent.
  • At increasing concentrations, detergent causes reversible incorporation, lipid removal, and eventual bilayer solubilization.
  • Behavior mirrors that observed with lipid vesicles.

Conclusions:

  • Supported planar lipid bilayers exhibit similar Triton X-100 interaction patterns as lipid vesicles.
  • OWLS provides a sensitive method for studying detergent-lipid interactions in situ.

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