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Updated: Jun 7, 2026

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
Published on: March 18, 2012
Computer-controlled system for the study of oxidase reactions: application to the peroxidase-oxidase oscillator
Andrew G McDonald1, Keith F Tipton
1School of Biochemistry and Immunology, Trinity College, Dublin 2, Ireland. amcdonld@tcd.ie
Abstract:
An apparatus for the study of bisubstrate oxidase reactions at maintained steady-state substrate concentrations is described, and its specific application to the peroxidase-oxidase biochemical oscillator is reported. Instrument control and data acquisition are provided by custom software written in LabVIEW. The software allows measurement, recording, and control of dissolved oxygen through a Clark-type oxygen electrode, reaction monitoring by a UV/vis spectrophotometer, and controlled substrate delivery by a syringe infusion pump. For peroxidase from horseradish, the optimal pH for oscillatory behavior was found to be in the range 4.5-5.5.
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