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Expansion Microscopy
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Published Date:
Jan 15 2015
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Publisher's site:
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Source:Science. 347(6221):543-548.
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[PDF-1013.63 KB]
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Alternative Title:Science
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Description:In optical microscopy, fine structural details are resolved by using refraction to magnify images of a specimen. We discovered that by synthesizing a swellable polymer network within a specimen, it can be physically expanded, resulting in physical magnification. By covalently anchoring specific labels located within the specimen directly to the polymer network, labels spaced closer than the optical diffraction limit can be isotropically separated and optically resolved, a process we call expansion microscopy (ExM). Thus, this process can be used to perform scalable superresolution microscopy with diffraction-limited microscopes. We demonstrate ExM with apparent ~70-nanometer lateral resolution in both cultured cells and brain tissue, performing three-color superresolution imaging of ~10(7) cubic micrometers of the mouse hippocampus with a conventional confocal microscope.
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Subject:
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Pubmed ID:25592419
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Pubmed Central ID:PMC4312537
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