Simultaneous calibration heterogeneous immunoassay
First Claim
1. An internally calibrated diagnostic apparatus comprising a support, a measurement first surface of a porous material mounted on said support;
- a calibration second surface of a porous material mounted on said support in close proximity to said first surface;
a member of a specific binding pair non-diffusively bound to said first surface; and
an enzyme non-diffusively bound to said second surface.
4 Assignments
0 Petitions
Accused Products
Abstract
An assay method and compositions are provided for determining the presence of an analyte in a sample. The analyte is a member of an immunological pair (mip) comprising ligand and receptor. By providing a first measurement surface capable of specifically binding a labelled reagent in an amount depending upon the presence of analyte in the sample and a second calibration surface capable of binding a second labeled reagent in a manner unaffected by the presence of analyte in the sample, calibration of individual tests can be accomplished simultaneously with the performance of the test itself. A signal producing system includes an enzyme, a catalyst usually bonded to a mip which defines the first labeled reagent for binding to the measurement surface and the same catalyst conjugated to a ligand capable of binding to the calibration surface. Preferably, both labeled reagents have the same composition and the calibration surface includes anti-(first catalyst).
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Citations
6 Claims
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1. An internally calibrated diagnostic apparatus comprising a support, a measurement first surface of a porous material mounted on said support;
- a calibration second surface of a porous material mounted on said support in close proximity to said first surface;
a member of a specific binding pair non-diffusively bound to said first surface; and
an enzyme non-diffusively bound to said second surface. - View Dependent Claims (2, 5, 6)
- a calibration second surface of a porous material mounted on said support in close proximity to said first surface;
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3. A kit for use in a diagnostic assay, said kit comprising (i) an internally calibrated diagnostic apparatus comprising a support, a measurement first surface of a porous material mounted on said support;
- a calibration second surface of a porous material mounted on said support in close proximity to said first surface;
a member of a specific binding pair non-diffusively bound to said first surface; and
a member of a specific binding pair non-diffusively bound to said first surface; and
a member of a specific binding pair non-diffusively bound to said second surface; and
(ii) an enzyme-bound-member of a specific binding pair, where the member of a specific binding pair bound to said second surface and the member of said enzyme-bound-member of a specific binding pair are the same, complementary or both bind to different binding sites on the same ligand.
- a calibration second surface of a porous material mounted on said support in close proximity to said first surface;
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4. A device which comprises:
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a support, at least one measurement first surface of a porous material mounted on said support; at least one calibration second surface of a porous material mounted on said support in close proximity to said first surface, a member of a specific binding pair non-diffusively bound to said first surface, and an anti-enzyme non-diffusively bound to said second surface.
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Specification