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Science beyond Barriers

abberior dyes & labels

2017
Biophysical journal

Polarity-sensitive probes for superresolution stimulated emission depletion microscopy

Authors:

Sezgin, E., Schneider, F., Zilles, V., Urbančič, I., Garcia, E., Waithe, D., ... & Eggeling, C.

Abstract:

The lateral organization of molecules in the cellular plasma membrane plays an important role in cellular signaling. A critical parameter for membrane molecular organization is how the membrane lipids are packed. Polarity-sensitive dyes are powerful tools to characterize such lipid membrane order, employing, for example, confocal and two-photon microscopy. The investigation of potential nanodomains, however, requires the use of superresolution microscopy. Here, we test the performance of the polarity-sensitive membrane dyes Di-4-ANEPPDHQ, Di-4-AN(F)EPPTEA, and NR12S in superresolution stimulated emission depletion microscopy. Measurements on cell-derived membrane vesicles, in the plasma membrane of live cells, and on single virus particles, show the high potential of these dyes for probing nanoscale membrane heterogeneity.

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