Figure 3.

Quantitative protein adsorption. Amounts of adsorbed protein, determined via bicinchoninic acid assay directly on the surface or after protein desorption in the eluates. Median ± interquartile range. Adsorption on functionalized surfaces was performed from (A) whole human saliva or (B) human AB serum. On each surface, differences in the amounts of adsorbed protein obtained with the applied quantification methods were evaluated with the nonparametric Mann-Whitney U test, and statistically significant differences (*P < 0.05) are indicated. Further comparison of the 2 quantification methods as well as time kinetics of protein adsorption from saliva and serum are provided in the Appendix.