Expression of redox-sensitive proteins. Densitometry analyses of Western blots for expression of redox-sensitive proteins GCLC, GCLM, and HMOX1 in lung homogenates from (A) male and (B) female Gclm mice, 24 h after aspiration of dispersion medium vehicle (Control) or 25 µg MWCNT. The results are means and SEM (n=5–6 mice/group), adjusted to the loading control, β-actin, and calculated as the fold-change relative to the mean of each genotype's control.