Enzyme detection biosensors
First Claim
1. A biosensor for use in detecting the presence of an enzyme or enzymes in a sample, the biosensor comprising a membrane and means for determining the impedance of the membrane positioned relative to the membrane such that the impedance of the membrane may be determined, the membrane having ionophores therein to which are attached linkers, the linkers being cleavable by the enzyme or enzymes to be detected, the cleavage of the linker causing a change in the ability of ions to pass through the membrane via the ionophores.
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Abstract
The present invention provides a biosensor for use in detecting the presence of an enzyme or enzymes in a sample. The biosensor comprises a membrane and means for determining the impedance of the membrane. The membrane includes ionophores therein to which are attached linkers. The linkers are cleavable by the enzyme or enzymes to be detected, with the cleavage of the linker causing a change in the ability of ions to pass through the membrane via the ionophores.
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Citations
27 Claims
- 1. A biosensor for use in detecting the presence of an enzyme or enzymes in a sample, the biosensor comprising a membrane and means for determining the impedance of the membrane positioned relative to the membrane such that the impedance of the membrane may be determined, the membrane having ionophores therein to which are attached linkers, the linkers being cleavable by the enzyme or enzymes to be detected, the cleavage of the linker causing a change in the ability of ions to pass through the membrane via the ionophores.
- 10. A biosensor for use in detecting the presence of an enzyme in a sample, the biosensor comprising a membrane and means for determining the impedance of the membrane positioned relative to the membrane such that the impedance of the membrane may be determined, the membrane having a plurality of ionophores and a plurality of membrane-spanning components therein, the membrane-spanning components having attached thereto linker molecules to which are connected the ionophores, the linker molecules being cleavable by the enzyme to be detected, the cleavage of the linker molecules causing a change in the ability of ions to pass through the membrane via the ionophores.
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17. A biosensor for the detection of enzymes comprising first and second zones, means to allow addition of a sample suspected to contain a protease to the first zone, the first zone containing a probe linked to a carrier via a linker cleavable by the enzyme and means to allow passage of unlinked probe from the first zone to the second zone;
- the second zone including a membrane the impedance of which is dependent on the presence or absence of the probe and means to measure the impedance of the membrane positioned relative to the membrane such that the impedance of the membrane may be determined.
- View Dependent Claims (18, 19, 20, 21, 22, 23)
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27. A biosensor for use in detecting the presence of an enzyme or enzymes in a sample, the biosensor comprising a membrane and a detector positioned relative to the membrane for determining the impedance of the membrane, the membrane having ionophores therein to which are attached linkers, the linkers being cleavable by the enzyme or enzymes to be detected, the cleavage of a linker causing a change in the ability of ions to pass through the membrane via the ionophores.
Specification