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  • Two-color nanoscopy of three-dimensional volumes by 4Pi detection of stochastically switched fluorophores.

Two-color nanoscopy of three-dimensional volumes by 4Pi detection of stochastically switched fluorophores.

Nature methods (2011-03-15)
Daniel Aquino, Andreas Schönle, Claudia Geisler, Claas V Middendorff, Christian A Wurm, Yosuke Okamura, Thorsten Lang, Stefan W Hell, Alexander Egner
ABSTRACT

We demonstrate three-dimensional (3D) super-resolution imaging of stochastically switched fluorophores distributed across whole cells. By evaluating the higher moments of the diffraction spot provided by a 4Pi detection scheme, single markers can be simultaneously localized with <10 nm precision in three dimensions in a layer of 650 nm thickness at an arbitrarily selected depth in the sample. By splitting the fluorescence light into orthogonal polarization states, our 4Pi setup also facilitates the 3D nanoscopy of multiple fluorophores. Offering a combination of multicolor recording, nanoscale resolution and extended axial depth, our method substantially advances the noninvasive 3D imaging of cells and of other transparent materials.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Atto 532 maleimide, BioReagent, suitable for fluorescence, ≥90% (coupling to thiols)
Sigma-Aldrich
Atto 532 NHS ester, BioReagent, suitable for fluorescence, ≥90% (HPLC)
Sigma-Aldrich
Atto 532, BioReagent, suitable for fluorescence, ≥90% (HPCE)