FIG. 2.

Northern blot analysis of the expression of dps in P. gingivalis W50 and W83 after treatment with different H₂O₂ concentrations. Panel A shows dps expression in W50 treated for 5 and 20 min. Panel B shows expression of dps in W83 after treatment for 5 min. The probe used was dps (Table 1). The number above each lane represents the H₂O₂ μM concentration. The number below each lane represents the relative intensity of the bands compared to the untreated sample (no H₂O₂ added). All bands were normalized to the intensity of the corresponding 16S rRNA band in the ethidium bromide-stained gel photographed prior to transfer.