Journal of Chemical Biology

, Volume 3, Issue 3, pp 101–112 | Cite as

Towards native-state imaging in biological context in the electron microscope

  • Anne E. Weston
  • Hannah E. J. Armer
  • Lucy M. Collinson
Review

Abstract

Modern cell biology is reliant on light and fluorescence microscopy for analysis of cells, tissues and protein localisation. However, these powerful techniques are ultimately limited in resolution by the wavelength of light. Electron microscopes offer much greater resolution due to the shorter effective wavelength of electrons, allowing direct imaging of sub-cellular architecture. The harsh environment of the electron microscope chamber and the properties of the electron beam have led to complex chemical and mechanical preparation techniques, which distance biological samples from their native state and complicate data interpretation. Here we describe recent advances in sample preparation and instrumentation, which push the boundaries of high-resolution imaging. Cryopreparation, cryoelectron microscopy and environmental scanning electron microscopy strive to image samples in near native state. Advances in correlative microscopy and markers enable high-resolution localisation of proteins. Innovation in microscope design has pushed the boundaries of resolution to atomic scale, whilst automatic acquisition of high-resolution electron microscopy data through large volumes is finally able to place ultrastructure in biological context.

Keywords

Transmission electron microscopy Scanning electron microscopy Artifacts Native state Cryopreparation Cryo-EM ESEM Correlative Volume EM FIB/SEM SBF/SEM 

Notes

Acknowledgement

The authors’ research was supported by Cancer Research UK.

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Anne E. Weston
    • 1
  • Hannah E. J. Armer
    • 1
  • Lucy M. Collinson
    • 1
  1. 1.Electron Microscopy UnitLondon Research Institute, Cancer Research UKLondonUK

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