Binding assay device
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United States of America Patent
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Feb 18, 1997
Issued Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Oct 30, 1985
priority date (Note) -
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Abstract
A device for performing an enzyme-labelled binding assay comprises an absorbent material and a developing solution, wherein the absorbent material is provided with a plurality of reagent zones including an indicator reagent zone, and is capable of transporting the developing solution by capillary action sequentially through each reagent zone, and wherein the indicator reagent zone includes a reagent capable, directly or indirectly, of immobilizing an enzyme-labelled reagent in an amount dependent upon the assay result, characterized in that the developing solution includes a signal producing substrate for the enzyme. The substrate moves slower through the absorbent material than the enzyme-labelled reagent or any compound of the enzyme-labelled reagent formed in the assay. The absorbent material is suitably in the form of an elongate strip provided with transverse reagent zones. The device is useful form performing immunoassays including immunometric assays and dual analyte assays.
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