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Merck
  • Feasibility of protein A for the oriented immobilization of immunoglobulin on silicon surface for a biosensor with imaging ellipsometry.

Feasibility of protein A for the oriented immobilization of immunoglobulin on silicon surface for a biosensor with imaging ellipsometry.

Journal of biochemical and biophysical methods (2003-09-27)
Zhanhui Wang, Gang Jin
摘要

The feasibility of using protein A to immobilize antibody on silicon surface for a biosensor with imaging ellipsometry was presented in this study. The amount of human IgG bound with anti-IgG immobilized by the protein A on silicon surface was much more than that bound with anti-IgG immobilized by physical adsorption. The result indicated that the protein A could be used to immobilize antibody molecules in a highly oriented manner and maintain antibody molecular functional configuration on the silicon surface. High reproducibility of the amount of antibody immobilization and homogenous antibody adsorption layer on surfaces could be obtained by this immobilization method. Imaging ellipsometry has been proven to be a fast and reliable detection method and sensitive enough to detect small changes in a molecular monolayer level. The combination of imaging ellipsometry and surface modification with protein A has the potential to be further developed into an efficient immunoassay protein chip.

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Sigma-Aldrich
二氯二甲基硅烷, ≥99.5%
Sigma-Aldrich
二氯二甲基硅烷, ≥98.5% (GC)
Supelco
硅烷化溶液 I, ~5% (dimethyldichlorosilane in heptane), Selectophore
Sigma-Aldrich
二氯二甲基硅烷, produced by Wacker Chemie AG, Burghausen, Germany, ≥99.0% (GC)