Competitive adsorption of (a) trypsin inhibitor, cytochrome c, or hemoglobin to MIPs and NIPs in serum buffer and (b) lysozyme, cytochrome c, and fluorescent trypsin when incubated simultaneously in 0.1× PBS. MIPs adsorbed significantly more (a) cytochrome c and (b) cytochrome c and lysozyme, than their non-imprinted controls. n = 4–5, presented as average ± SEM. *p< 0.05, **p< 0.01, ***p< 0.001 compared to NIP 2-way ANOVA with multiple comparisons. n.s. = no statistical significance, # = below assay detection.