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Related Experiment Videos

Recent advances in fluorescence cross-correlation spectroscopy.

Ling Chin Hwang1, Thorsten Wohland

  • 1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore. l.hwang1@physics.ox.ac.uk

Cell Biochemistry and Biophysics
|September 18, 2007
PubMed
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Fluorescence cross-correlation spectroscopy (FCCS) analyzes dual-labeled molecules to study molecular interactions and dynamics. This review details FCCS methods, probes, and biological applications for researchers.

Area of Science:

  • Biophysics
  • Molecular Biology
  • Spectroscopy

Background:

  • Fluorescence cross-correlation spectroscopy (FCCS) quantifies temporal fluorescence fluctuations from dual-labeled molecules in a small volume.
  • Cross-correlation analysis of fluorescence signals reveals molecular dynamics, diffusion coefficients, binding constants, and kinetic rates.
  • FCCS is vital for studying molecular interactions in solutions and cells, and for measuring flow properties.

Purpose of the Study:

  • To provide a comprehensive overview of Fluorescence cross-correlation spectroscopy (FCCS) methodologies.
  • To highlight the diverse biological applications of FCCS.
  • To guide biological researchers in selecting appropriate FCCS experimental schemes and fluorescent probes.

Main Methods:

  • Analysis of temporal fluorescence fluctuations from two differently labeled molecules.

Related Experiment Videos

  • Cross-correlation analysis of fluorescence signals from separate detection channels.
  • Review of excitation and detection methodologies, including dual-focal spot cross-correlation.

    • Main Results:

    • FCCS enables precise characterization of diffusion coefficients, binding constants, and kinetic rates.
    • Recent advancements focus on improving sensitivity and addressing experimental limitations like cross-talk and alignment.
    • A variety of fluorescent probes are available for different FCCS methods.

    Conclusions:

    • FCCS is an essential tool for investigating molecular dynamics and interactions in biological systems.
    • This review serves as an introduction to FCCS, its techniques, and probe selection for biological studies.
    • Understanding FCCS methodologies empowers researchers to choose optimal experimental setups for their specific research questions.