1. any of various techniques for detecting an antigen or antibody in a sample by coupling its specifically interactive antibody or antigen to a fluorescent compound, mixing with the sample, and observing the reaction under an ultraviolet-light microscope.


  1. a method used to determine the location of antibodies or antigens in which the antibodies or antigens are labelled with a fluorescent dye


  1. Any of various methods that use antibodies chemically linked to a fluorescent dye to identify or quantify antigens in a tissue sample.
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