Tropinin I calibrator and method of use thereof in a sandwich immunoassay
First Claim
1. A calibrator for use in a sandwich immunoassay for tropinin I, wherein the tropinin I is bound between a first antibody or fragment thereof and a labelled second antibody or fragment thereof said calibrator comprising (a) a third antibody or fragment thereof which specifically binds either (i) to said first antibody or fragment thereof or (ii) to said labelled second antibody or fragment thereof, said third antibody or fragment thereof conjugated to (ii) at least one peptide which consists of an antibody binding site of said troponin I and which specifically binds to whichever of either (i) said first antibody or fragment thereof or (ii) said labelled second antibody or fragment thereof which is not bound by said third antibody or fragment thereof.
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Accused Products
Abstract
A conjugate consisting of a sequence of the analyte and an antibody against one of the antibodies used in the test can be employed, in aqueous solution and in precisely known quantity, as a stable calibrator in a sandwich immunoassay for detecting the analyte.
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Citations
7 Claims
- 1. A calibrator for use in a sandwich immunoassay for tropinin I, wherein the tropinin I is bound between a first antibody or fragment thereof and a labelled second antibody or fragment thereof said calibrator comprising (a) a third antibody or fragment thereof which specifically binds either (i) to said first antibody or fragment thereof or (ii) to said labelled second antibody or fragment thereof, said third antibody or fragment thereof conjugated to (ii) at least one peptide which consists of an antibody binding site of said troponin I and which specifically binds to whichever of either (i) said first antibody or fragment thereof or (ii) said labelled second antibody or fragment thereof which is not bound by said third antibody or fragment thereof.
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7. In a sandwich immunoassy for determining tropinin I in a sample, wherein the tropinin I in the sample is bound between a first antibody or fragment thereof and a labelled second antibody or fragment thereof to form a complex and the amount of formed complex is measured relative to the amount of complex formed by a known amount of troponin I calibrator to determine the amount of the tropinin I in the sample, wherein the improvement comprises using as the calibrator
a calibrator comprising (a) a third antibody or fragment thereof which specifically binds either (i) to said first antibody or fragment thereof or (ii) to said labelled second antibody or fragment thereof, said third antibody or fragment thereof conjugated to (ii) at least one peptide which consists of an antibody binding site of said troponin I and which specifically binds to whichever of either (i) said first antibody or fragment thereof or (ii) said labelled second antibody or fragment thereof which is not bound by said third antibody or fragment thereof.
Specification