Abstract
By combining astigmatism imaging with a dual-objective scheme, we improved the image resolution of stochastic optical reconstruction microscopy (STORM) and obtained <10-nm lateral resolution and <20-nm axial resolution when imaging biological specimens. Using this approach, we resolved individual actin filaments in cells and revealed three-dimensional ultrastructure of the actin cytoskeleton. We observed two vertically separated layers of actin networks with distinct structural organizations in sheet-like cell protrusions.
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Acknowledgements
We thank G. Danuser for helpful discussion. This work was supported in part by the US National Institutes of Health and a Collaborative Innovation Award (43667) from Howard Hughes Medical Institute and Gatsby Charitable Foundation (to X.Z.). X.Z. is funded by the Howard Hughes Medical Institute.
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K.X., H.P.B. and X.Z. designed research. K.X. did experiments and data analysis. H.P.B. assisted with the optical setup. K.X. and X.Z. prepared the manuscript. X.Z. supervised the project.
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Xu, K., Babcock, H. & Zhuang, X. Dual-objective STORM reveals three-dimensional filament organization in the actin cytoskeleton. Nat Methods 9, 185–188 (2012). https://doi.org/10.1038/nmeth.1841
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DOI: https://doi.org/10.1038/nmeth.1841
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