Abstract
Abstract Fluorescent fusion proteins are widely used to visualize the localization of proteins in worms, fish, flies and tissue culture cells. We have used two different methods that use high pressure freezing (HPF) combined with correlative light microscopy (LM) and TEM. The first method uses fluorescence from live organisms immobilized in agarose followed by HPF and standard freeze substitution in dry solvent with osmium. This pre-embedding method optimizes ultrastructural preservation. A second, post-embedding method preserves fluorescence and immunoreactivity from embedded and polymerized thin sections. Here we describe post-embedding fluorescent integrated TEM images (F-TEM).
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