US5334508A
Expired / Lapsed
US
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Process and agent for the colorimetric determination of an analyte by means of enzymatic oxidation
Assignee: Roche Diagnostics GmbH
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Filing: 1993-01-14
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Granted: 1994-08-02
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Expires: 2013-01-14
Abstract
Abstract The present invention provides a process for the colorimetric determination of an analyte by means of enzymatic oxidation of the analyte in the presence of an electron acceptor and determination of the reduced electron acceptor by color formation as measure for the amount of the analyte, wherein the analyte is oxidized with an appropriate oxidoreductase in the presence of a substance selected from the group of compounds with nitrogen in an oxidation stage between +1 and -1 as direct electron acceptor. The present invention also provides an agent for the colorimetric determination of an analyte by enzymatic oxidation of the analyte, containing an oxidoreductase and a color-forming electron acceptor, wherein the color-forming electron acceptor is a substance reacting directly with the analyte/enzyme system selected from the group of compounds with nitrogen in an oxidation stage between +1 and -1.
Inventors
- 👤 Joachim Hoenes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/26; C12Q1/32; H; H01; H01R; H01R13/00; H01R13/73; H05; H05K; H05K7/00; H05K7/02; H05K7/12; H01R13/46
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
69 words
A composition for use in the colorimetric determination of an analyte comprising a) an oxidoreductase enzyme dependent from the cofactors flavine or PQQ which is effective to oxidize the analyte; b) an aromatic nitroso compound or a tautomerically equivalent oxime compound which is effective to accept electrons from the enzyme/cofactor to cause a color change in the reaction mixture; and c) a coupling reagent for an oxidative coupling reaction.
Claim 2
Dependent Claim
69 words
A composition for use in the colorimetric determination of an analyte comprising a) an oxidoreductase enzyme dependent from the cofactors flavine or PQQ which is effective to oxidize the analyte; b) an aromatic nitroso compound or a tautomerically equivalent oxime compound which is effective to accept electrons from the enzyme/cofactor to cause a color change in the reaction mixture; and c) a coupling reagent for an oxidative coupling reaction.
Claim 3
Dependent Claim
71 words
The composition according to claim 1, wherein the aromatic nitroso compound is a nitroso benzene derivative of the formula ##STR7## wherein R is hydroxyl or amino group, the amino group being optionally substituted by one or more lower alkyl radicals which can be substituted by a hydroxyl group, or by an amino group substituted by one or more lower alkyl radicals, PO 3 H 2 , SO 3 H or COOH.
Claim 4
Dependent Claim
16 words
The composition according to claim 2, wherein R is a hydroxyl, dimethylamino, diethylamino or dihydroxylethylamino group.
Claim 5
Dependent Claim
77 words
The composition according to claim 1, wherein the oxime compound is an oxime of the formula III ##STR8## wherein R' is an oxygen atom, a further oxime group or a positively charged amino group, the amino group optionally being substituted by one or two lower alkyl radicals which can be substituted by a hydroxyl group or an amino group substituted by one or more lower alkyl radicals, PO 3 H 2 , COOH or SO 3 H.
Claim 6
Dependent Claim
38 words
The composition according to any one of claims 1-4, wherein the oxidoreductase is a flavin-dependent oxidase selected from the group consisting of L- or D-amino acid oxidase, cholesterol oxidase, glucose oxidase, glycerol-3-phosphate oxidase, lactate oxidase and pyruvate oxidase.
Claim 7
Dependent Claim
17 words
The composition according to any one of claims 1-4; wherein the PQQ-dependent oxidoreductase is PQQ-dependent glucose dehydrogenase.
Claim 8
Dependent Claim
18 words
The composition according to any one of claims 1-4; wherein the PQQ-dependent oxidoreductase is a PQQ-dependent alcohol dehydrogenase.
Claim 9
Dependent Claim
73 words
A composition for use in the colorimetric determination of an analyte comprising a) an oxidoreductase enzyme dependent from the cofactors flavine or PQQ which will oxidize the analyte; b) an aromatic nitroso compound or a tautomerically equivalent oxime compound which will accept electrons from the enzyme/cofactor to cause a color change in the reaction mixture; and c) a substance which forms a color by transition from the oxidized form into the reduced form.
Claim 10
Dependent Claim
73 words
A composition for use in the colorimetric determination of an analyte comprising a) an oxidoreductase enzyme dependent from the cofactors flavine or PQQ which will oxidize the analyte; b) an aromatic nitroso compound or a tautomerically equivalent oxime compound which will accept electrons from the enzyme/cofactor to cause a color change in the reaction mixture; and c) a substance which forms a color by transition from the oxidized form into the reduced form.
Claim 11
Dependent Claim
71 words
The composition according to claim 8, wherein the aromatic nitroso compound is a nitroso benzene derivative of the formula ##STR9## wherein R is hydroxyl or amino group, the amino group being optionally substituted by one or more lower alkyl radicals which can be substituted by a hydroxyl group, or by an amino group substituted by one or more lower alkyl radicals, PO 3 H 2 , SO 3 H or COOH.
Claim 12
Dependent Claim
16 words
The composition according to claim 9, wherein R is a hydroxyl, dimethylamino, diethylamino or dihydroxylethylamino group.
Claim 13
Dependent Claim
77 words
The composition according to claim 8, wherein the oxime compound is an oxime of the formula III ##STR10## wherein R' is an oxygen atom, a further oxime group or a positively charged amino group, the amino group optionally being substituted by one or two lower alkyl radicals which can be substituted by a hydroxyl group or an amino group substituted by one or more lower alkyl radicals, PO 3 H 2 , COOH or SO 3 H.
Claim 14
Dependent Claim
38 words
The composition according to any one of claims 8-11, wherein the oxidoreductase is a flavin-dependent oxidase selected from the group consisting of L- or D-amino acid oxidase, cholesterol oxidase, glucose oxidase, glycerol-3-phosphate oxidase, lactate oxidase and pyruvate oxidase.
Claim 15
Dependent Claim
18 words
The composition according to any one of claims 8-11, wherein the PQQ-dependent oxidoreductase is a PQQ-dependent glucose dehydrogenase.
Claim 16
Dependent Claim
18 words
The composition according to any one of claims 8-11, wherein the PQQ-dependent oxidoreductase is a PQQ-dependent alcohol dehydrogenase.
Claim 17
Dependent Claim
53 words
A composition for use in the colorimetric determination of an analyte comprising a) an oxidoreductase enzyme dependent from the cofactor PQQ which will oxidize the analyte; b) an aromatic nitroso compound or a tautomerically equivalent oxime compound which will accept electrons from the enzyme/cofactor to cause a color change in the reaction mixture.
Claim 18
Dependent Claim
53 words
A composition for use in the colorimetric determination of an analyte comprising a) an oxidoreductase enzyme dependent from the cofactor PQQ which will oxidize the analyte; b) an aromatic nitroso compound or a tautomerically equivalent oxime compound which will accept electrons from the enzyme/cofactor to cause a color change in the reaction mixture.
Claim 19
Dependent Claim
71 words
The composition according to claim 15, wherein the aromatic nitroso compound is a nitroso benzene derivative of the formula ##STR11## wherein R is hydroxyl or amino group, the amino group being optionally substituted by one or more lower alkyl radicals which can be substituted by a hydroxyl group, or by an amino group substituted by one of more lower alkyl radicals, PO 3 H 2 , SO 3 H or COOH.
Claim 20
Dependent Claim
16 words
The composition according to claim 16, wherein R is a hydroxyl, dimethylamino, diethylamino or dihydroxylethylamino group.
Claim 21
Dependent Claim
77 words
The composition according to claim 15, wherein the oxime compound is an oxime of the formula III ##STR12## wherein R' is an oxygen atom, a further oxime group or a positively charged amino group, the amino group optionally being substituted by one or two lower alkyl radicals which can be substituted by a hydroxyl group or an amino group substituted by one or more lower alkyl radicals, PO 3 H 2 , COOH or SO 3 H.
Claim 22
Dependent Claim
18 words
The composition according to any one of claims 15-18, wherein the PQQ-dependent oxidoreductase is a PQQ-dependent glucose dehydrogenase.
Claim 23
Dependent Claim
18 words
The composition according to any one of claims 15-18, wherein the PQQ-dependent oxidoreductase is a PQQ-dependent alcohol dehydrogenase.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |