Figure 6

APC mRNA levels in HCT-116 cells treated with MNNG. HCT-116 cells were treated with different concentrations of MNNG (0–100 μM) either for 15 h or for 50 h. After the treatment, the total RNA was isolated for Northern blot analysis as described in Materials and Methods. Panel A shows a representative autoradiogram of APC mRNA and corresponding 18 S RNA after 15 h of MNNG (0–100 μM) treatment. Panel B shows a representative autoradiogram of APC mRNA and corresponding 18 S RNA after 50 h of MNNG (0–100 μM) treatment. The level of 18 S mRNA was used for normalizing loading errors and transfer efficiency.