Figure 2. Resistance of GL13K-peptide coating to proteolytic degradation in saliva.

A) Percentage of fluorescently-labeled GL13K peptides released after 11days of incubation in saliva from surfaces coated with covalently-bonded (cov-GL13K) or physically adsorbed peptides (pTi-phys-GL13K). The homogeneity of the peptides retained on the coated surfaces was observed by fluorescence microscopy (B). The peptides were not notably degraded or removed from the surface after being exposed to the enzyme-containing biological solution. Error bars are the standard deviation of three samples in each group.