NADPH oxidation and cytochrome c reduction with and without lucigenin as well as NAD(P)H/lucigenin-dependent chemiluminescence of rat liver microsomes were studied. An increased rate of NADPH oxidation and cytochrome c reduction in the presence of lucigenin was related to one-electron lucigenin reduction by microsomal NADPH reductases. The apparent Michaelis constant values for lucigenin (Km ap...

Membrane protein complexes can support both the generation and utilization of a transmembrane electrochemical proton potential (Deltap), either by supporting transmembrane electron transfer coupled to protolytic reactions on opposite sides of the membrane or by supporting transmembrane proton transfer. Regarding the first mechanism, this has been unequivocally demonstrated to be operational for...

The study of natural enzymes is complicated by the fact that only the most recent evolutionary progression can be observed. In particular, natural oxidoreductases stand out as profoundly complex proteins inwhich the molecular roots of function, structure and biological integration are collectively intertwined and individually obscured. In the present paper, we describe our experimental approach...

Reagentless fructose and alcohol biosensors have been produced with a versatile enzyme immobilisation technique which mimics natural interactions and flexibility of living systems. The electrode architecture is built up on electrostatic interactions by the sequential adsorption of redox polyelectrolytes and redox enzymes giving rise to the efficient transformation of substrate fluxes into elect...