Related Experiment Videos
A novel electro-optical sensor format with generic applicability for exploitation with NAD(P) dependent enzymes
Karen A Law1, Rachael J Warrington, Antony McGurk
1Institute of Bioscience and Technology, Cranfield University at Silsoe, Bedforshire MK45, 4DT, Silsoe, UK.
Biosensors & Bioelectronics
|April 23, 2003
Summary
A novel enzyme electrode uses optical signals to detect NAD(P)-dependent enzymes. This biosensor, featuring immobilized dichlorophenol indophenol (DCPIP), enables sensitive quantification of adenosine triphosphate (ATP) via colorimetric changes.
Area of Science:
- Biotechnology
- Biosensor Development
- Enzyme Electrodes
Background:
- NAD(P)-dependent enzymes are crucial in biological processes.
- Existing detection methods for these enzymes can be limited.
- Development of generic and sensitive enzyme electrodes is needed.
Purpose of the Study:
- To develop a novel optically interrogated enzyme electrode.
- To demonstrate its generic applicability for NAD(P)-dependent enzymes.
- To quantify adenosine triphosphate (ATP) using this biosensor.
Main Methods:
- Enzyme electrode fabrication using multi-enzyme pathway (pyruvate kinase, hexokinase, glucose-6-phosphate dehydrogenase, diaphorase).
- Immobilization of dichlorophenol indophenol (DCPIP) in an o-phenylenediamine polymer film on a gold-coated polyethylene sheet.
- Optical interrogation of colorimetric changes in immobilized DCPIP.
Main Results:
- The developed optrode successfully detected ATP.
- A color change from blue to red was observed for immobilized DCPIP upon ATP presence.
- The sensor demonstrated sensitivity to ATP concentrations.
Conclusions:
- The novel optically interrogated enzyme electrode shows promise for detecting NAD(P)-dependent enzymes.
- This biosensor offers a sensitive and colorimetric method for ATP quantification.
- The immobilization strategy enhances sensor performance and applicability.