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Label-Free and Real-Time Detection of Antigen-Antibody Capture Processes Using the Oblique-Incidence Reflectivity Difference Technique |
HE Li-Ping 1,2, DAI Jun1, SUN Yue1,2, WANG Jing-Yi1, LÜ Hui-Bin1**, WANG Shu-Fang2**, JIN Kui-Juan1, ZHOU Yue-Liang1, YANG Guo-Zhen1 |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
2College of Physics Science and Technology, Hebei University, Baoding 071002 |
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Cite this article: |
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Abstract We successfully label-free and real-time detect the capture processes of human immunoglobulin G (IgG)/goat anti-human IgG and mouse IgG/goat anti-mouse IgG antigen-antibody pairs with different concentrations using the oblique-incidence reflectivity difference (OIRD) method, and obtain the interaction kinetics curves and the interaction times. The experimental results prove that the OIRD method is a promising technique for label-free and real-time detection of the biomolecular interaction processes and achieving the quantitative information of interaction kinetics.
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Received: 13 February 2012
Published: 29 July 2012
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PACS: |
07.60.Fs
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(Polarimeters and ellipsometers)
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81.70.Fy
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(Nondestructive testing: optical methods)
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87.80.Dj
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(Spectroscopies)
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83.85.Ei
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(Optical methods; rheo-optics)
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