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Maurícia B. Fritzen-Garcia, Vinícius C. Zoldan, Inês Rosane W.Z. Oliveira, Valdir Soldi, André A. Pasa and Tânia B. Creczynski-Pasa Peroxidase immobilized on phospholipid bilayers supported on au (111) by DTT self-assembled monolayers: Application to dopamine determination Biotechnology and Bioengineering 110

Version of Record online: 18 SEP 2012 | DOI: 10.1002/bit.24721

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Peroxidase (HRP) was immobilized on dimyristoylphosphatidylcholine (DMPC) bilayers supported on Au (111) by dithiotreitol (DTT) self-assembled monolayers. The presence of white spots on immuno-gold labeled samples in the atomic force microscopy (AFM) images confirms the immobilization of HRP on lipid bilayers. Square-wave voltammetry (SWV) experiments were performed to investigate the performance of the HRP–DMPC bilayer system as a nanostructured electrochemical biosensor. The present results indicate that the system can catalyze the redox reaction of dopamine efficiently.

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