Time-resolved fluorescence polarization from ordered biological assemblies

T. P. Burghardt

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We calculate the time dependence of the polarized fluorescence signal from fluorescent-labeled elements of a biological assembly that are rotationally diffusing in an arbitrary three-dimensional angular potential. We have formulated this calculation using the model-independent description of the angular potential wherein the angular potential is described by an expansion in a complete set of orthonormal functions with the expansion coefficients (or order parameters) determined by time-independent methods (Burghardt, T. P., 1984, Biopolymers, 23:2382–2406). We have applied the calculation to fluorescent-labeled myosin cross-bridges in relaxed muscle fibers. In a related paper we describe the experimental observation of the myosin cross-bridges rotationally diffusing in an angular potential (Burghardt, T. P., and N. L. Thompson, 1985, Biochemistry, 24:3731–3735).

Original languageEnglish (US)
Pages (from-to)623-631
Number of pages9
JournalBiophysical Journal
Issue number4
StatePublished - 1985

ASJC Scopus subject areas

  • Biophysics


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