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High-Pressure Freezing for Scanning Transmission Electron Tomography Analysis of Cellular Organelles

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Cell Imaging Techniques

Part of the book series: Methods in Molecular Biology ((MIMB,volume 931))

Abstract

Using an electron microscope’s scanning transmission mode (STEM) for collection of tomographic datasets is advantageous compared to bright field transmission electron microscopic (TEM). For image formation, inelastic scattering does not cause chromatic aberration, since in STEM mode no image forming lenses are used after the beam has passed the sample, in contrast to regular TEM. Therefore, thicker samples can be imaged. It has been experimentally demonstrated that STEM is superior to TEM and energy filtered TEM for tomography of samples as thick as 1 μm. Even when using the best electron microscope, adequate sample preparation is the key for interpretable results. We adapted protocols for high-pressure freezing of cultivated cells from a physiological state. In this chapter, we describe optimized high-pressure freezing and freeze substitution protocols for STEM tomography in order to obtain high membrane contrast.

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Acknowledgment

We thank Li Wang, Ulm University for providing the sample shown in the figure.

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Correspondence to Paul Walther .

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Walther, P., Schmid, E., Höhn, K. (2012). High-Pressure Freezing for Scanning Transmission Electron Tomography Analysis of Cellular Organelles. In: Taatjes, D., Roth, J. (eds) Cell Imaging Techniques. Methods in Molecular Biology, vol 931. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-056-4_28

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  • DOI: https://doi.org/10.1007/978-1-62703-056-4_28

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  • Publisher Name: Humana Press, Totowa, NJ

  • Print ISBN: 978-1-62703-055-7

  • Online ISBN: 978-1-62703-056-4

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