Figure 1From: Lung glutathione adaptive responses to cigarette smoke exposureAirway cells export GSH in response to CSE over time. The extracellular (A) and intracellular (B) GSH levels after the exposure of 16HBE cells to 20% CSE at 12, 24, and 48 hours. Data represented as mean ± SEM, with different letters representing statistically significant differences between groups, p < 0.05.Back to article page