Additional correction for energy transfer efficiency calculation in filter-based Förster resonance energy transfer microscopy for more accurate results

Yuansheng Sun; Ammasi Periasamy

doi:10.1117/1.3407655

1 March 2010 Additional correction for energy transfer efficiency calculation in filter-based Förster resonance energy transfer microscopy for more accurate results

Yuansheng Sun, Ammasi Periasamy

Author Affiliations +

Journal of Biomedical Optics, Vol. 15, Issue 2, 020513 (March 2010). https://doi.org/10.1117/1.3407655

Abstract

Förster resonance energy transfer (FRET) microscopy is commonly used to monitor protein interactions with filter-based imaging systems, which require spectral bleedthrough (or cross talk) correction to accurately measure energy transfer efficiency (E). The double-label (donor+acceptor) specimen is excited with the donor wavelength, the acceptor emission provided the uncorrected FRET signal and the donor emission (the donor channel) represents the quenched donor (qD), the basis for the E calculation. Our results indicate this is not the most accurate determination of the quenched donor signal as it fails to consider the donor spectral bleedthrough (DSBT) signals in the qD for the E calculation, which our new model addresses, leading to a more accurate E result. This refinement improves E comparisons made with lifetime and spectral FRET imaging microscopy as shown here using several genetic (FRET standard) constructs, where cerulean and venus fluorescent proteins are tethered by different amino acid linkers.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Yuansheng Sun and Ammasi Periasamy "Additional correction for energy transfer efficiency calculation in filter-based Förster resonance energy transfer microscopy for more accurate results," Journal of Biomedical Optics 15(2), 020513 (1 March 2010). https://doi.org/10.1117/1.3407655

Published: 1 March 2010

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KEYWORDS

Fluorescence resonance energy transfer

Microscopy

Optical filters

Energy transfer

Image filtering

Resonance energy transfer

Energy efficiency

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