Abstract
The objective of the present study was to develop a cytophotometric technique to quantitate immunocytochemical reactions. Cell antigens were detected after immunophosphatase alkaline staining procedure. The amount of reaction product was quantitated by computerized scanning cytophotometry. The technical conditions (dilution of primary antibody; incubation time of the three antibodies; volume and pH of the enzyme substrate reaction; storage of the slides) required for optimal cytophotometric determination of the reaction product were determined. Under these optimally defined conditions, a linear relationship between cell protein content (lysozyme) and microdensitometric measure of the colored reaction product was found. This method could be used for other cells, antigens, and enzymatic indicators.
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