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Glutathione levels in lungs. Lung total glutathione content measured 24 h after aspiration of dispersion medium vehicle (Control) or 25 µg MWCNT by (A) male and (B) female Gclm mice. Results are means and SEM (n=5–6 mice/group). # p < 0.05, ## p<0.01, ### p<0.001 compared to same-treatment Gclm+/+, & p<0.05 compared to same-treatment, same-genotype males. Abbreviations: GSH, glutathione; MWCNT, multiwalled carbon nanotube.
