| 摘要 |
Three different receptors are used to determine a polyvalent antigen, of which the first and the third are dissolved in a liquid phase and are able to bind to the antigen, the second receptor is present in solid phase and is able to bind to only a part of the first receptor, and the third receptor carries a label and does not cross-react with the first and second receptor, and the antigen is incubated with the first and the third receptor, then the incubation solution is contacted with the second receptor, after which the phases are separated, and the label in one of the phases is measured.
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