光谱学与光谱分析 |
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Study of Applying Fluorescence Spectrum Imaging to Quantitative Assay of Proteins in Bio-Chip |
CHAO Ke-fu1,2,ZHANG You-lin1,KONG Xiang-gui1*,LI Bing1,ZENG Qing-hui1,SONG Kai1,2,SUN Ya-juan1 |
1. Key Laboratory of Excited State Processes, Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China |
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Abstract In the present work, the amount and the activity of the goat anti-human IgG, to bind the human IgG labelled with fluorescein isothiocyanate (FITC), immobilized on silicon surfaces modified with APTES and APTES-Glu, respectively, were studied using the fluorescence spectrum imaging(FSI), the results of which were compared with that of ellipsometry. It is shown that the amount of the human IgG labeled with FITC on APTES-Glu measured using FSI is 2.8 times higher than that on APTES, which is nearly coincident with the 2.2 times obtained using ellipsometry, showing that the activity of the goat anti-human IgG on APTES-Glu is higher than that on APTES. It is reasoned that the FSI is used in the fluorescence immunoassay the for measurement of quasi-quantification or quantification.
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Received: 2007-05-10
Accepted: 2007-08-20
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Corresponding Authors:
KONG Xiang-gui
E-mail: xgkong14@ciomp.ac.cn
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