Fig. 2. SPR sensorgram traces performed with PSA-imprinted surfaces on the SPR chip and different concentrations of (a) PSA and (b) RNAse B flowed over the surface. (c) SPR responses at equilibrium against the concentration of injected protein, PSA, lysozyme, α-1-acid glycoprotein (α1-AGP), RNAse B, bovine serum albumin (BSA), α-1-antitrypsin (α1-AT) and horseradish peroxidase (HRP), from which dissociation constants (K _d) have been obtained.