Lipid domain formation and ligand-receptor distribution in lipid bilayer membranes investigated by atomic force microscopy

Research output: Contribution to journalJournal articleResearchpeer-review

  • Thomas Kaasgaard
  • Ole G. Mouritsen
  • Kent Jorgensen

A novel experimental technique, based on atomic force microscopy (AFM), is proposed to visualize the lateral organization of membrane systems in the nanometer range. The technique involves the use of a ligand-receptor pair, biotin-avidin, which introduces a height variation on a solid-supported lipid bilayer membrane. This leads to a height amplification of the lateral membrane organization that is large enough to be clearly imaged by scanning AFM. The power of the technique is demonstrated for a binary dipalmitoylphosphocholine-diarachidoylphosphocholine lipid mixture which is shown to exhibit a distinct lateral lipid domain formation. The new and simple ligand-receptor-based AFM approach opens up new ways to investigate lipid membrane microstructure in the nanometer range as well as the lateral distribution of ligand-lipid and receptor-protein complexes in supported membrane systems.

Original languageEnglish
JournalFEBS letters
Issue number1-3
Pages (from-to)29-34
Number of pages6
Publication statusPublished - 27 Mar 2002

    Research areas

  • Atomic force microscopy, Avidin, Biotin, Langmuir-Blodgett film, Lipid bilayer membrane, Lipid domain, Lipid membrane heterogeneity, Lipid mixture, Phosphatidylcholine

ID: 230986874