Abstract
Anti-fluorescein antibodies were found to prevent the fading of emitted fluorescence from fibroblasts stained with fluorescein-labelled fibronectin antibodies. The prevention of fading is the result of specific binding of the fluorochromes present on the stained cells by the anti-fluorescein antibodies. The sheep anti-FITC antibody used in this study was equally effective in preventing the fading of both FITC- and carboxyfluorescein-labelled fibronectin antibodies. The method is simple, effective, does not interfere with the primary immune reaction, and in addition to preventing the fading of fluorescence it reduced the background fluorescence of the specimens. The procedure is expected to make an important contribution to improving the quality of fluorescence immunohistochemical techniques used in diagnosis.
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