Abstract
Advances in Immunochemistry allow for labelling of various tissue components with highly specific antibodies, that in turn may be labelled with marker substances such as flourescein for light microscopy, or any of a number of electron-dense substances, such as ferritin and colloldal gold, for localization with scanning and transmission electron miscroscopy. The methods used for transmission electron microscopy are designed to minimize damage to antigenic sites while preserving ultrastructure. The methods include embedding of the tissue in resins with low-temperature curing characteristics such as Polyethylene glycol (PEG) or Lowicryl K4M (Chemische Werke Lowl, F.R.G.). The tissue is embedded, sectioned, and mounted on grids. The Immuno-reactions are then carried out on these mounted sections.
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