(a)
(b)
(c)
Figure 3: Electrophoretogram of RNA (a) and influence of L-Cys on the COII mRNA expression of the A549 cells damaged by acetaldehyde (b, c). Lanes 1 to 5 represent 200 μmol/L acetaldehyde, 40 μmol/L L-Cys + 200 μmol/L acetaldehyde, 160 μmol/L L-Cys + 200 μmol/L acetaldehyde, 640 μmol/L L-Cys + 200 μmol/L acetaldehyde, and 0 μmol/L L-Cys + 0 μmol/L acetaldehyde (control group), respectively. Data are presented as the mean ± S.E. ; , with respect to the control group; and with respect to the 200 μmol/L acetaldehyde group.