Imprinted polymers with cyclodextrin pseudo-polyrotaxanes as pseudo-supports for protein recognition

► Cyclodextrin pseudo-polyrotaxanes (CD-PPRs) are used for protein recognition. ► CD-PPRs are formed by γ-cyclodextrins with polymer chains which length controlled. ► The specificity relies on the spatial configuration between CD-PPR and metal ions. ► The specific adsorption proteins were collected with a 0.500 mol L−1 KCl solution.