Antigen Binding to Cells: Determination by Enzymic Fluorogenic Group Hydrolysis

Abstract
A sensitive method for detecting cells containing antibody to β-galactosidase has been devised. The enzyme attached to the cells containing antibody can hydrolyze a fluorogenic substrate and yield fluorescent products which are measured microphotofluorometrically. This method of detecting a few molecules of antibody is applicable to other enzyme antigen systems.
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