Signal amplification method for surface plasmon...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving antigen-antibody binding – specific binding protein...

Reexamination Certificate

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C422S082110, C435S006120, C435S007920, C435S287200, C435S288700, C435S808000, C436S164000, C436S512000, C436S514000, C436S524000, C436S525000, C436S805000, C436S827000

Reexamination Certificate

active

07405054

ABSTRACT:
The present invention provides methods and compositions for amplifying the detection signal in surface plasmon resonance (SPR)-based flow systems. The signal amplification methods comprise the use of well established marker systems that provide a precipitate. The marker systems include, for example, enzyme and nucleation systems. Enzymes suitable for use as a marker system include peroxidases and phosphatases. The amplification system is useful in any SPR-based detection system including microfluidic systems, e.g., “lab on a chip” systems and the like. The methods can comprise any SPR-based assay format, including typical immunoassay formats. The immunoassay formats can include competitive and sandwich assays. Analyte capture agents can include antibodies, lectins, carbohydrates, polynucleotides, receptor proteins, and the like.

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