An amine-reactive tetraphenylethylene derivative for protein detection in SDS-PAGE
Ng, Ka Ming
Luo, Kathy Qian
Tang, Ben Zhong
Date of Issue2012
School of Chemical and Biomedical Engineering
A new aggregation-induced emission (AIE) compound 1,2-bis[4-(isothiocyanatomethyl)phenyl]-1,2-diphenylethene (2) was synthesized for use in SDS-PAGE. The molecule is practically nonemissive in solution but becomes highly emissive after reacting with the amine groups of the proteins by either the prestaining or poststaining method. The sensitivity of 2 achieved in the prestaining method is the same as that of Coomassie brilliant blue (CBB), while that observed in the poststaining method is higher than that of CBB. Excellent linear responses with the amount of protein were obtained in both cases. The detection of a mixture of proteins with different molecular weights was successfully achieved.
© 2012 The Royal Society of Chemistry.