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. 1983 Jul;80(13):4012–4016. doi: 10.1073/pnas.80.13.4012

Photoelectron microscopy and immunofluorescence microscopy of cytoskeletal elements in the same cells.

K K Nadakavukaren, L B Chen, D L Habliston, O H Griffith
PMCID: PMC394190  PMID: 6191327

Abstract

Pt K2 rat kangaroo epithelial cells and Rat-1 fibroblasts were grown on conductive glass discs, fixed, and permeabilized, and the cytoskeletal elements actin, keratin, and vimentin were visualized by indirect immunofluorescence. After the fluorescence microscopy, the cells were postfixed and dehydrated for photoelectron microscopy. The contrast in these photoelectron micrographs is primarily topographical in origin, and the presence of fluorescent dyes at low density does not contribute significantly to the material contrast. By comparison with fluorescence micrographs obtained on the same individual cells, actin-containing stress fibers, keratin filaments, and vimentin filaments were identified in the photoelectron micrographs. The apparent volume occupied by the cytoskeletal network in the cells as judged from the photoelectron micrographs is much less than it appears to be from the fluorescence micrographs because the higher resolution of photoelectron microscopy shows the fibers closer to their true dimensions. Photoelectron microscopy is a surface technique, and the images highlight the exposed cytoskeletal structures and suppress those extending along the substrate below the nuclei. The results reported here show marked improvement in image quality of photoelectron micrographs and that this technique has the potential of contributing to higher resolution studies of cytoskeletal structures.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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