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Fabrication of Recombinant Azurin Self-Assembled Layer for the Application of Bioelectronic Device

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A novel immobilization method of cupredoxin azurin on a gold surface was developed without a chemical linker using recombinant technique. A recombinant protein with cysteine residue by site-directed mutagenesis (SDM) was designed and then directly self-assembled on Au surface. The layer of the functionalized protein immobilized is confirmed by surface plasmon resonance (SPR) and its surface morphology is analyzed by scanning tunneling microscopy (STM). The immobilization efficiency has been increased about 73.2%, as compared to that of wild type azurin. The electrochemical property of the fabricated thin layer was investigated by the cyclic voltammetry (CV). As a result, cysteine-substituted azurin can be used for making high quality protein film, and applied to the fabrication of nano-scale bioelectronics.
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Keywords: CYCLIC VOLTAMMETRY (CV); P. AERUGINOSA AZURIN; SCANNING PROBE MICROSCOPY (SPM); SELF-ASSEMBLY (SA); SITE-DIRECTED MUTAGENESIS (SDM); SURFACE PLASMON RESONANCE (SPR)

Document Type: Research Article

Publication date: 2008-10-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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