An iminodiacetate-modified conjugated polyelectrolyte for fluorescent labeling of histidine-tagged proteins†
Abstract
The iminodiacetate–Ni2+–hexahistidine system is extensively used in protein purification. In this study, an anionic conjugated polyelectrolyte (CPE) with a poly(p-phenylene ethynylene) backbone and iminodiacetate side chains, named PPEIDA, was designed and synthesized. Recognition and visualization of hexahistidine-tagged (His-tagged) proteins using PPEIDA was demonstrated.