Method for quantitatively determining a particular substrate catalyzed by a multisubstrate enzyme
First Claim
1. In a method for quantitatively determining the amount of a particular substrate, catalyzed by a multisubstrate enzyme (having a direct redox dependent activity) to react with oxygen and form hydrogen peroxide as a reaction product, wherein the improvement comprises the steps of:
- applying an electrical potential to said enzyme, said electrical potential being sufficient to control the activity of said multisubstrate enzyme, contacting said enzyme with a solution containing at least said particular substrate, and measuring for an electroactive reactant or product of the reaction mechanism whereby a rapid, direct quantitative analysis is obtained.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for control of relative enzyme activity for analytical purposes. The activity of a multisubstrate enzyme may be controlled as a function of the electrical potential applied to the enzyme. The enzyme is preferrably incorporated into a thin layer electrochemical cell laminate having exterior membrane layers and an interior enzyme layer. A control electrode located within the enzyme layer applies an electrical potential to the enzyme. An intermediate electron transfer agent may be used to transfer electrons to and from the enzyme and the control electrode.
456 Citations
9 Claims
-
1. In a method for quantitatively determining the amount of a particular substrate, catalyzed by a multisubstrate enzyme (having a direct redox dependent activity) to react with oxygen and form hydrogen peroxide as a reaction product, wherein the improvement comprises the steps of:
- applying an electrical potential to said enzyme, said electrical potential being sufficient to control the activity of said multisubstrate enzyme, contacting said enzyme with a solution containing at least said particular substrate, and measuring for an electroactive reactant or product of the reaction mechanism whereby a rapid, direct quantitative analysis is obtained.
- View Dependent Claims (2, 3, 7, 8, 9)
-
4. In a method for quantitatively determining the amounts of particular substrates, catalyzed by a multisubstrate enzyme (having a direct redox dependent activity) to react with oxygen and form hydrogen peroxide as a reaction product, wherein the improvement comprises the steps of:
- applying at least two different electrical potentials to said enzyme, said electrical potentials being sufficient to render different the relative sensitivity of the enzyme for at least two of the substrates present, contacting said enzyme with a solution containing at least two substrates, and measuring for an electroactive reactant or product of the reaction mechanism whereby a rapid, direct quantitative analysis is obtained.
- View Dependent Claims (5)
-
6. In a method of measuring for the presence of substrates, catalyzed by a multisubstrate enzyme (having a direct redox dependent activity) to react with oxygen and form hydrogen peroxide as a reaction product, wherein the improvement comprises the steps of applying an electrical potential to said enzyme, contacting said enzyme with a solution containing at least one substrate catalyzed by said enzyme, continuously varying the electrical potential applied and measuring for an electroactive reactant or product of the reaction mechanism as a function of the potential applied to said enzyme whereby a rapid, direct qualitative analysis is obtained.
Specification