A FLIM Microscopy Based on Acceptor-Detected Förster Resonance Energy Transfer

Roberto F. Delgadillo, Katie A. Carnes, Kathia Zaleta-Rivera, Omar Olmos, Lawrence J. Parkhurst

Research output: Contribution to journalArticlepeer-review

Abstract

Time-resolved donor-detected Förster resonance energy transfer (trDDFRET) allows the observation of molecular interactions of dye-labeled biomolecules in the μ10-100 Å region. However, we can observe longer-range interactions when using time-resolved acceptor-detected FRET (trADFRET), since the signal/noise ratio can be improved when observing the acceptor emission. Therefore, we propose a new methodology based on trADFRET to construct a new fluorescence lifetime microscopy (FLIM-trADFRET) technique to observe biological machinery in the range of 100-300 Å in vivo, the last frontier in biomolecular medicine. The integrated trADFRET signal is extracted in such a way that noise is canceled, and more photons are collected, even though trADFRET and trDDFRET have the same rate of transfer. To assess our new methodology, proof of concept was demonstrated with a set of well-defined DNA scaffolds.

Original languageEnglish (US)
Pages (from-to)4841-4849
Number of pages9
JournalAnalytical Chemistry
Volume93
Issue number11
DOIs
StatePublished - Mar 23 2021

ASJC Scopus subject areas

  • Analytical Chemistry

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