Diffusion and binding properties investigated by Fluorescence Correlation Spectroscopy (FCS)

UMMS Affiliation

Department of Biochemistry and Molecular Pharmacology; RNA Therapeutics Institute



Document Type


Medical Subject Headings

*Algorithms; Binding Sites; Biopolymers; Diffusion; Fluorescent Antibody Technique; Kinetics; Protein Interaction Mapping; Spectrometry, Fluorescence; Statistics as Topic


During the last years, Fluorescence Correlation Spectroscopy (FCS) has proven to be a powerful tool for basic research in many applications. The combination of a minimal detection volume in the femtoliter range coupled with very high sensitivity extends the possibilities to design sensitive homogeneous tests. In this article we illustrate the analysis of binding processes with FCS based on the changes in diffusion characteristics of GFP upon binding to an antibody. Problems induced by highly heterogeneous samples are discussed and differences of GFP binding to a monoclonal and a polyclonal antibody are shown and analyzed. We stress data processing, limitations and useful approximations in FCS methodology. Basic ideas of data acquisition and processing as well as new developments and applications are presented.


Citation: Grünwald D, Cardoso MC, Leonhardt H, Buschmann V. Diffusion and binding properties investigated by Fluorescence Correlation Spectroscopy (FCS). Curr Pharm Biotechnol. 2005 Oct;6(5):381-6. doi:10.2174/138920105774370616

At the time of publication, David Grünwald was not yet affiliated with the University of Massachusetts Medical School.

Related Resources

Link to Article in PubMed


fluorescence correlation spectroscopy, gfp, kinetics, binding assay, antibody

PubMed ID