Single-photon smFRET. III. Application to pulsed illumination

Matthew Safar, Ayush Saurabh, Bidyut Sarkar, Mohamadreza Fazel, Kunihiko Ishii, Tahei Tahara, Ioannis Sgouralis, Steve Pressé

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Förster resonance energy transfer (FRET) using pulsed illumination has been pivotal in leveraging lifetime information in FRET analysis. However, there remain major challenges in quantitative single-photon, single-molecule FRET (smFRET) data analysis under pulsed illumination including 1) simultaneously deducing kinetics and number of system states; 2) providing uncertainties over estimates, particularly uncertainty over the number of system states; and 3) taking into account detector noise sources such as cross talk and the instrument response function contributing to uncertainty; in addition to 4) other experimental noise sources such as background. Here, we implement the Bayesian nonparametric framework described in the first companion article that addresses all aforementioned issues in smFRET data analysis specialized for the case of pulsed illumination. Furthermore, we apply our method to both synthetic as well as experimental data acquired using Holliday junctions.

Original languageEnglish (US)
Article number100088
JournalBiophysical Reports
Issue number4
StatePublished - Dec 14 2022

ASJC Scopus subject areas

  • Biochemistry
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Biophysics
  • Biotechnology


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