Abstract: Disclosed are methods and apparatus for performing highly sensitive enzyme-amplified assays using channel electrophoresis of an enzyme having a biorecognition moiety. Combining a binding reaction of an analyte and an enzyme having a biorecognition moiety, and an electrophoretic separation which uses enzyme-amplified detection methodology, assay methods and apparatus are provided that offer simplicity, quantitative sensitivity and rapid analysis. Also disclosed are highly sensitive catalytically-amplified assays using a capillary electrophoresis format in which the binding reaction prior to electrophoresis is heterogeneous or homogeneous, and direct or competitive. The methods and apparatus for conducting sensitive automated catalytically-amplified assays using electrophoresis may be conducted in a microscale format.

Abstract: Compositions, methods, and apparatus for performing ultrafast binding assays by capillary electrophoresis or other electroseparation techniques are disclosed. In one embodiment, a first binding partner carries a detectable label and a second binding partner is modified to be highly charged. When used in combination with a sample containing an analyte with which both binding partners can interact and bind thereto, a three-membered complex is formed. The electrophoretic mobility difference between the unbound and complex-bound forms of labeled first binding partner is such that electroseparation and subsequent detection of an analyte can be accomplished. The compositions, methods, and apparatus disclosed herein also permit quantitative determination of the concentration of an analyte in a sample.

Abstract: Compositions, methods, and apparatus for performing ultrafast binding assays by capillary electrophoresis or other electroseparation techniques are disclosed. In one embodiment, a first binding partner carries a detectable label and a second binding partner is modified to be highly charged. When used in combination with a sample containing an analyte with which both binding partners can interact and bind thereto, a three-membered complex is formed. The electrophoretic mobility difference between the unbound and complex-bound forms of labeled first binding partner is such that electroseparation and subsequent detection of an analyte can be accomplished. The compositions, methods, and apparatus disclosed herein also permit quantitative determination of the concentration of an analyte in a sample.