Fig. 3.

Sodium sulfide increases oxidative DNA base damage. The alkaline comet assay with FPG treatment was used to detect oxidative base damage following 0 or 476 μM Na₂S treatment for 4 h (A) and the tail moment was measured using OpenComet (B). Analysis was performed on 3 independent experiments with at least 50 cells in each experiment. Error bars represent SD and * represents P < 0.05 using a Student's t-test.