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- W2039078882 abstract "The amplified sensing of an antibody by an antigen monolayer-functionalized transducer by using a biocatalyzed precipitation of an insoluble product on the transducer is addressed. Faradaic impedance spectroscopy, cyclic voltammetry and microgravimetric, quartz crystal microbalance analyses are used to probe the precipitation of the insoluble product on the transducer. A dinitrophenyl, DNP, antigen monolayer is assembled on a Au-electrode, or a Au-quartz crystal, as a sensing interface for the dinitrophenyl-antibody, DNP-Ab. An anti-Fc-antibody-HRP conjugate is used as a biocatalytic probe for the formation of the antigen/DNP-Ab complex on the transducer. Biocatalyzed oxidation of 4-chloronaphthol by H2O2 in the presence of the anti-Fc-antibody-HRP conjugate yields an insoluble product on the transducer. Formation of the insoluble film on the electrode results in the increase of interfacial electron-transfer resistances detected by impedance spectroscopy or cyclic voltammetry. The precipitate formation also results in the mass increase of the modified Au-quartz crystal detected as a frequency change of the piezoelectric transducer. The DNP-Ab is easily sensed at a sensitivity that corresponds to 0.5 ng mL–1 (3×10–12 M)." @default.
- W2039078882 created "2016-06-24" @default.
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- W2039078882 date "2000-10-01" @default.
- W2039078882 modified "2023-10-16" @default.
- W2039078882 title "Probing Antigen-Antibody Interactions on Electrode Supports by the Biocatalyzed Precipitation of an Insoluble Product" @default.
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- W2039078882 doi "https://doi.org/10.1002/1521-4109(200010)12:14<1097::aid-elan1097>3.0.co;2-x" @default.
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