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- W4223994617 abstract "Abstract Stimulated emission depletion (STED) microscopy achieves super-resolution by exciting a diffraction-limited volume and then suppressing fluorescence in its outer parts by depletion. Multiple depletion lasers may introduce misalignment and bleaching. Hence, a single depletion wavelength is preferable for multi-color analyses. However, this limits the number of usable spectral channels. Using cultured cells, common staining protocols, and commercially available fluorochromes and microscopes we exploit that the number of fluorochromes in STED or confocal microscopy can be increased by phasor based fluorescence lifetime separation of two dyes with similar emission spectra but different fluorescent lifetimes. In our multi-color FLIM-STED approach two fluorochromes in the near red (exc. 594 nm, em. 600-630) and two in the far red channel (633/641-680), supplemented by a single further redshifted fluorochrome (670/701-750) were depleted with 775 nm. To the best of our knowledge, these are the first published five color STED images. Generally, this approach doubles the number of fully distinguishable colors in laser scanning microscopy. We provide evidence that eight color FLIM-STED with a single depletion laser would be possible if suitable fluorochromes were identified and we confirm that a fluorochrome may have different lifetimes depending on the molecules to which it is coupled." @default.
- W4223994617 created "2022-04-19" @default.
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- W4223994617 date "2022-04-13" @default.
- W4223994617 modified "2023-09-26" @default.
- W4223994617 title "Stimulated emission depletion microscopy with a single depletion laser using five fluorochromes and fluorescence lifetime phasor separation" @default.
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- W4223994617 doi "https://doi.org/10.1101/2022.04.13.487856" @default.
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