Cytokinesis Blocked Micronucleus (CBMN) Analysis: A. Percent MN per 1000 BN scored. B. Percent BN with presence of MN. There were dose-dependent increases in percent MN per 1000 BN as well as in percent BN with presence of MN in all lymphoblastoid cells. XPA-L and XPB-L both did not show significant increase in damage markers compared to Normal-L. XPD-L, however, exhibited significantly higher damage markers not only than Normal-L lymphoblastoid cells, but XPA-L and XPB-L as well. **p < 0.01, ***p < 0.001 compared to Normal-L. Two-way ANOVA.