Enzyme quantitation wicking assay

Details Enzyme quantitation wicking assay Enzyme quantitation wicking assay

G - Physics

01

N

167/45, 150/15.2

G01N 33/558 (2006.01) G01N 33/542 (2006.01) G01N 33/58 (2006.01)

Patent

CA 1336163

Diagnostic assays are provided comprising complementary enzyme fragments of .beta.-galactosidase, where one of the fragments is bound to a support and the other fragment is conjugated to an immunologically cross-reactive epitope of the analyte or complementary to an analyte receptor. One can achieve a determin- ation of ligand, by providing for competition between the ligand analyte and the conjugate for receptor, where binding to the receptor allows for discrimination between complexed enzyme fragment conjugate and uncomplexed enzyme fragment conjugate. The assay medium is then allowed to wick onto a support to which the complementary fragment is substantially uniformly bound in the detection region. The support is then developed, where color formation from the substrate in the detection region is used as a measure of the presence of analyte in the sample.

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