Multisignal reagents for labeling analytes
First Claim
1. A competitive assay method for quantifying the amount of an analyte in a sample, comprising the steps of:
- (a) combining(i) a sample suspected of containing the analyte,(ii) a detection composition,comprising the same analyte or an analog thereof bound covalently to a polymer or bound covalently to a first member of a first binding pair that binds a second member of the first binding pair that is bound to a polymer,said polymer comprisingmore than one signal moiety, ora first member of a second binding pair bound to a second member of the second binding pair,wherein a signal moiety is covalently bound to the second member of the second binding pair, andwherein the analyte or analog thereof is not a member of the first binding pair or the second binding pair, and(iii) a binding agent capable of binding to analyte of the sample and to the covalently bound analyte or analyte analog of the detection composition; and
(b) detecting signal from signal moieties of any detection composition that is bound to the binding agent,wherein the amount of signal detected is inversely proportional to the amount of the analyte in the sample, andwherein the signal moiety is selected from the group consisting of a fluorescent dye, a colored dye, a radioactive molecule, a chemiluminescent molecule, and an enzyme.
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Accused Products
Abstract
Provided is a composition comprising an analyte bound covalently or through a first binding pair to a polymer. In this composition, the analyte is less than about 2000 MW; the polymer further comprises more than one signal or first member of a second binding pair; and the analyte is not a member of the first binding pair or the second binding pair. Also provided is an assay for an analyte. The assay comprises: combining a sample suspected of containing the analyte with the above-described composition and a binding agent that binds to the analyte; and detecting the signal or the first member of the second binding pair that is bound to the binding agent. Additionally provided is a multisignal labeling reagent comprising a first polymer covalently bound to (a) a reactive group or a first member of a first binding pair, and (b) more than one digoxigenin molecule.
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Citations
15 Claims
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1. A competitive assay method for quantifying the amount of an analyte in a sample, comprising the steps of:
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(a) combining (i) a sample suspected of containing the analyte, (ii) a detection composition, comprising the same analyte or an analog thereof bound covalently to a polymer or bound covalently to a first member of a first binding pair that binds a second member of the first binding pair that is bound to a polymer, said polymer comprising more than one signal moiety, or a first member of a second binding pair bound to a second member of the second binding pair, wherein a signal moiety is covalently bound to the second member of the second binding pair, and wherein the analyte or analog thereof is not a member of the first binding pair or the second binding pair, and (iii) a binding agent capable of binding to analyte of the sample and to the covalently bound analyte or analyte analog of the detection composition; and (b) detecting signal from signal moieties of any detection composition that is bound to the binding agent, wherein the amount of signal detected is inversely proportional to the amount of the analyte in the sample, and wherein the signal moiety is selected from the group consisting of a fluorescent dye, a colored dye, a radioactive molecule, a chemiluminescent molecule, and an enzyme. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification