(a)
(b)
(c)
(d)
(e)
Figure 5: Influence of L-Cys on cell cycle and the apoptosis rate of A549 cell damaged by acetaldehyde. (a) Control; (b) 200 μmol/L acetaldehyde; (c) 40 μmol/L L-Cys + acetaldehyde; (d) 160 μmol/L L-Cys + acetaldehyde; (e) 640 μmol/L L-Cys + acetaldehyde.