FIG. 4.
Percentage of binucleated bystander DU-145 cells containing micronuclei after 4 h co-culture with DU-145 cells that had been irradiated with X rays (panel A) or α particles (panel B). The X-ray experiments were carried out in the presence or absence of DMSO and PTIO scavengers. The α-particle experiments were carried out with the bystander DU-145 cells present during the irradiation (Before) or added within 5 min after the irradiation (After). Results are the average of at least three independent experiments. Error bars represent ±1 SD. **P < 0.01, *P < 0.05 relative to X rays only (panel A) or α particles only (panel B).