The interaction between avidin and biotin as self-assembled monolayer on a gold electrode surface was electrochemically evaluated by monitoring the changes in the electrode response of the ferrocyanide ion as redox-marker. It was clarified that the permeability changes of avidin membrane introduced onto the biotin self-assembled monolayer against ferrocyanide ion were ascribed to electrostatic interaction between avidin and marker ion.
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Kuramitz et al. (1999) studied this question.
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