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Electron Microscopic Tomography of Cellular Organelles: Chemical Fixation Vs. Cryo-Substitution of Rat-Liver Mitochondria
Published online by Cambridge University Press: 02 July 2020
Extract
Electron microscopic tomography is proving to be a valuable tool for investigating the 3D structure and organization of cellular organelles. Important progress is being made in the application of the technique to frozen-hydrated material, but it is likely that success with thick specimens will be limited by the low contrast and beam sensitivity of naked biological material. Thus, optimizing procedures for fixing, embedding, staining, and selectively labelling cells for 3D electron microscopy remains a priority.
Tomography of chemically fixed and plastic-embedded rat-liver tissue and isolated mitochondria has shown that the cristae (the invaginations of the mitochondrial inner membrane) are pleiomorphic and connected to each other and to the surface of the inner membrane by tubular regions 30-40 nm in diameter. This basic design feature has important implications for the microcompartmentation of ions and molecules within this organelle.
- Type
- Unique Approaches In Imaging, Computation and Communication for Characterization of the 3D Cell & Organelles I
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- Copyright © Microscopy Society of America