Ultrastructural localization of neurophysin-like immunoreactivity in the rat posterior pituitary. An alternative method using frozen-dried tissue fixed with OsO4 vapor.

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Abstract
Electron microscopic identification of elements containing neurophysin-like immunoreactivity can be accomplished in rat posterior pituitary that has been frozen-dried and fixed with OsO4 vapor. Alternating serial ultrathin sections are placed on grids and glass slides. The sections on the slides are stained for neurophysin using immunofluorescence histochemistry, and the resultant images are superimposed on electron micrographs from the adjacent sections. The method provides several advantages for the localization of neuropeptide immunoreactivity in nervous tissue.

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