Figure 3. Degradation of gliadin-derived peptides by dental plaque bacteria.

The 33-mer or the 26-mer were added to a final concentration of 250 µg/ml to a suspension of dental plaque bacteria in saliva ion buffer (OD₆₂₀ 1.2). After t = 0 h, 2 h and 5 h, 100 µl aliquots were removed, boiled and subjected to RP-HPLC. A and C, chromatograms of the 33-mer and 26-mer peptides incubated in dental plaque suspension; B and D, 33-mer and 26-mer peptides incubated in saliva ion buffer only (control).