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Coordinate-targeted fluorescence nanoscopy with multiple off states.

MPG-Autoren
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Danzl,  J. G.
Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society;

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Sidenstein,  S.
Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society;

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Gregor,  C.
Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society;

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Urban,  N. T.
Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society;

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Ilgen,  P.
Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society;

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Jakobs,  S.
Research Group of Mitochondrial Structure and Dynamics, MPI for biophysical chemistry, Max Planck Society;

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Hell,  S. W.
Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society;

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Zitation

Danzl, J. G., Sidenstein, S., Gregor, C., Urban, N. T., Ilgen, P., Jakobs, S., et al. (2016). Coordinate-targeted fluorescence nanoscopy with multiple off states. Nature Photonics, 10(2), 122-128. doi:10.1038/nphoton.2015.266.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0029-C711-4
Zusammenfassung
Far-field super-resolution fluorescence microscopy discerns fluorophores residing closer than the diffraction barrier by briefly transferring them in different (typically ON and OFF) states before detection. In coordinate-targeted super-resolution variants, such as stimulated emission depletion (STED) microscopy, this state difference is created by the intensity minima and maxima of an optical pattern, causing all fluorophores to assume the off state, for instance, except at the minima. Although strong spatial confinement of the on state enables high resolution, it also subjects the fluorophores to excess intensities and state cycles at the maxima. Here, we address these issues by driving the fluorophores into a second off state that is inert to the excess light. By using reversibly switchable fluorescent proteins as labels, our approach reduces bleaching and enhances resolution and contrast in live-cell STED microscopy. Using two or more transitions to off states is a useful strategy for augmenting the power of coordinate-targeted super-resolution microscopy.