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Global DNA methylation in lung after 24 h or 7 days of MWCNT exposure. Levels of DNA methylation in the lungs of mice after exposure to DM or MWCNT for 7 days using the (A) LUMA and after 24 h and 7 days using the (B) 5-mC assay. Data expressed as mean ± SEM percent methylation. Asterisks indicate significance at *p<0.05, ***p<0.001 compared to the DM controls. n = 10 for DM control and n = 7 for MWCNT treatment for LUMA, and n = 9 in all groups for 5-mC.
