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Journal of Biomedical Optics

Spectroscopic approach for monitoring two-photon excited fluorescence resonance energy transfer from homodimers at the subcellular level
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Paper Abstract

We have employed a spectroscopic approach for monitoring fluorescence resonance energy transfer (FRET) in living cells. This method provides excellent spectral separation of green fluorescent protein (GFP) mutant signals within a subcellular imaging volume using two-photon excited fluorescence imaging and spectroscopy (TPIS-FRET). In contrast to current FRET-based methodologies, TPIS-FRET does not rely on the selection of optical filters, ratiometric image analysis, or bleedthrough correction algorithms. Utilizing the intrinsic optical sectioning capabilities of TPIS-FRET, we have identified protein–protein interactions within discrete subcellular domains. To illustrate the applicability of this technique to the detection of homodimer formation, we demonstrated the in vivo association of promyleocyte (PML) homodimers within their corresponding nuclear body.

Paper Details

Date Published: 1 July 2003
PDF: 5 pages
J. Biomed. Opt. 8(3) doi: 10.1117/1.1584052
Published in: Journal of Biomedical Optics Volume 8, Issue 3
Show Author Affiliations
Vickie J. LaMorte, Univ. of California/Irvine (United States)
Aikaterini Zoumi, Univ. of California/Irvine (United States)
Bruce J. Tromberg, Univ. of California/Irvine (United States)

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