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Riboflavin (RF), the coenzyme of glucose oxidase, was esterified with a mercaptocarboxylic acid andimmobilized as a mixed SAM on gold electrodes with various thiols of different chain lengths andfunctional groups. The chemical environment around riboflavin modulates its redox behaviour byenhancing or preventing glucose oxidation. The system stability, the coverage and the behaviour atdifferent pH aqueous solutions were investigated for the several forms of immobilized RF. The bestelectrocatalytical activity was found to be the mixed systemcomposed of RF and 3,3’-thiodipropionicacid.
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L T Kubota (2007) studied this question.
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