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Electron transfer mediated by glucose oxidase at the liquid/liquid interface

Georganopoulou, DG; Caruana, DJ; Strutwolf, J; Williams, DE; (2000) Electron transfer mediated by glucose oxidase at the liquid/liquid interface. FARADAY DISCUSS , 116 (116) 109 - 118.

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Abstract

In order to establish an experimental basis for exploring the reactivity of membrane-bound redox enzymes using electrochemistry at an organic/aqueous interface, the reactivity of glucose oxidase adsorbed at the dichloroethane/water interface has been studied. Turnover of glucose in the aqueous phase mediated by dimethyl ferricenium electrogenerated in the organic phase was measured by measuring the feedback current caused by recycling the mediator as the generator electrode approached close to the interface from the organic side. An unexpected self-exchange reaction of the ferrocene at the interface was suppressed by adsorption of a surfactant. The interfacial enzyme reaction could be distinguished from reaction within the bulk of the aqueous phase. Reaction within a protein-surfactant film formed at the interface is conjectured.

Type:Article
Title:Electron transfer mediated by glucose oxidase at the liquid/liquid interface
Keywords:SCANNING ELECTROCHEMICAL MICROSCOPY, PROTEIN-FILM VOLTAMMETRY, DIGITAL-SIMULATION, PHOSPHOLIPID MONOLAYERS, POTENTIAL DEPENDENCE, EXTRAPOLATION METHOD, CYCLIC VOLTAMMETRY, LATERAL DIFFUSION, LIQUID INTERFACE, WATER-INTERFACE
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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