Fig. 2.

Sodium sulfide induces DNA double-strand break formation in GBM. Representative images of γH2AX foci following treatment with 476 μM Na₂S or degassed water for 4 h are shown (A). The number of foci per cell was quantified with JCount Pro using the same parameters for all cell types and replicates (B). Analysis was performed on 150 cells pooled from 3 independent experiments and error bars represent standard error of the mean (SEM). * represents P < 0.05 using a Student's t-test.