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- W2024483708 abstract "Abstract A cysteine mutant of a monomeric human Cu, Zn‐SOD (Glycine 61, Serine 142) has been immobilized directly on gold electrodes using the thiol groups introduced. The electrochemical behavior of the surface confined protein was studied in mixtures of aqueous buffer and DMSO up to an organic solvent content of 60%. The formal potential was found to be rather independent of the DMSO content. However, half peak width increased and the redoxactive amount clearly decreased with raising DMSO content. In addition, the kinetics of the heterogeneous electron transfer became slower; but still a quasireversible electrochemical conversion of the mutant SOD was feasible. Thus, the electrodes were applied for sensorial superoxide detection. At a potential of +220 mV vs. Ag/AgCl advantage was taken of the partial oxidation reaction of the enzyme. A defined superoxide signal was obtained in solutions up to 40% DMSO. The sensitivity of the mutant electrodes decreased linearly with the organic solvent content in solution but was still higher compared to conventional cyt.c based sensors. At DMSO concentrations higher than 40% no sensor response was detected." @default.
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- W2024483708 date "2006-10-01" @default.
- W2024483708 modified "2023-09-27" @default.
- W2024483708 title "Electrochemical and Sensorial Behavior of SOD Mutants Immobilized on Gold Electrodes in Aqueous/Organic Solvent Mixtures" @default.
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- W2024483708 doi "https://doi.org/10.1002/elan.200603620" @default.
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