Probing Antigen-Antibody Interaction Using Fluorescence Coupled Capillary Electrophoresis

International Journal of Molecular Sciences

Jianhao Wang¹  Lin Qiu¹  Cheli Wang¹  Yue Zhang¹  Jingyan Li¹  Jiang Xia² 

[1] School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, China; E-Mails:;Department of Chemistry, the Chinese University of Hong Kong, Shatin, Hong Kong

关键词: QDs;    FRET;    immunocomplex;    capillary electrophoresis;   

DOI  :  10.3390/ijms140919146

来源: mdpi

【 摘 要 】

In this report, the use of fluorescence detection coupled capillary electrophoresis (CE-FL) allowed us to fully characterize the antigen-antibody interaction. CE-FL allowed separation of unbound quantum dots (QDs) and ligand bound QDs and also revealed an ordered assembly of biomolecules on QDs. Further, we observed FRET from QDs donor to DyLight acceptor, which were covalently conjugated with human IgG and goat anti-human IgG, respectively. The immunocomplex was formed and the mutual affinity of the antigen and antibody brought QDs and DyLight close enough to allow FRET to occur. This novel CE-based technique can be easily extended to other FRET systems based on QDs and may have potential application in the detection of antibodies.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland