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US3852157A Expired / Lapsed US ⏱️ 0.0 years remaining

Compounds for enzyme amplification assay

Assignee: SYVA CORP
•
Filing: 1972-11-06
•
Granted: 1974-12-03
•
Expires: 1992-11-06
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Abstract

Abstract Novel biological assay method for determining the presence of a specific organic material by employing a modified enzyme for amplification. By employing receptors specific for one or a group of materials (hereinafter referred to as ''''ligands'''') and binding an enzyme to the ligand or ligand counterfeit to provide an ''''enzyme-bound-ligand,'''' an extremely sensitive method is provided for assaying for ligands. The receptor when bound to the enzyme-bound-ligand substantially inhibits enzymatic activity, providing for different catalytic efficiencies of enzyme-boundligand and enzyme-bound-ligand combined with receptor. The receptor, ligand and enzyme-bound-ligand are combined in an arbitrary order and the effect of the presence of ligand on enzymatic activity determined. Various protocols may be used for assaying for enzymatic activity and relating the result to the amount of ligand present.

Inventors

  • 👤 K Rubenstein
  • 👤 E Ullman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 12:06
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/531; G01N33/532; G01N33/535; G01N33/94; G01N33/946; G01N33/948; G01N33/9486; Y; Y10; Y10S; Y10S435/00; Y10S435/964; Y10S436/00; Y10S436/815; Y10S436/816

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 5 words
AN ENZYME-BOUND-LIGAND OF THE FORMULA:
Claim 2
Dependent Claim 5 words
AN ENZYME-BOUND-LIGAND OF THE FORMULA:
Claim 3
Dependent Claim 5 words
An enzyme-bound-ligand of the formula:
Claim 4
Dependent Claim 5 words
An enzyme-bound-ligand of the formula:
Claim 5
Dependent Claim 28 words
An enzyme-bound-ligand according to claim 2, wherein A** is an enzyme of from 10,000 to 300,000 molecular weight and n'' is in the range of 2 to 20.
Claim 6
Dependent Claim 10 words
An enzyme-bound-ligand according to claim 3, which is an oxidoreductase.
Claim 7
Dependent Claim 10 words
An enzyme-bound-ligand according to claim 3, which is a hydrolase.
Claim 8
Dependent Claim 19 words
An enzyme-bound-ligand according to claim 3, which is O3-carboxymethylmorphine conjugate to lysozyme having from 2 to 4 O3-carboxymethylmorphine groups.
Claim 9
Dependent Claim 20 words
An enzyme-bound-ligand according to claim 3, which is O3-carboxymethylmorphine conjugate to malate dehydrogenase having from 2 to 22 O3-carboxymethylmorphine groups.
Claim 10
Dependent Claim 21 words
An enzyme-bound-ligand according to claim 3 which is O3-carboxymethylmorphine conjugate to glucose 6-phosphate dehydrogenase having from 2 to 22 O3-carboxymethylmorphine groups.
Claim 11
Dependent Claim 24 words
An enzyme-bound-ligand according to claim 3 which is O3-( Alpha -isopropyl)carboxymethylmorphine conjugate to malate dehydrogenase having from 2 to 22 O3-( Alpha -isopropyl)carboxymethylmorphine groups.
Claim 12
Dependent Claim 26 words
An enzyme-bound-ligand according to claim 3 which is O3-( Alpha -isopropyl)carboxymethylmorphine conjugate to glucose 6-phosphate dehydrogenase having from 2 to 22 O3-( Alpha -isopropyl)carboxymethyl morphine groups.
Claim 13
Dependent Claim 18 words
An enzyme-bound-ligand according to claim 3, which is O3-imidoylmethylmorphine conjugate to lysozyme, glucose 6-phosphate dehydrogenase or malate dehydrogenase.

References Cited (Backward Citations)

US3639558A Cited
US3654090A Cited
US3654090B1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-12-02 1978-06-03 1978-12-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-12-02 1982-06-03 1982-12-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-12-02 1986-06-03 1986-12-03 $7700.00 Window Closed / Lapsed

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