Figure 4: The levels of c-Myc and Oct4 were enhanced in RSP-K12V cells and RSP-K12V tumor cells compared with those in RNSP-K12V cells and RNSPK12V tumor cells The levels of c-Myc and Oct4 in each of cell types were investigated by Western blot. The levels of both proteins were increased in RSP-K12V cells and RSPK12V tumor cells compared with that in RNSP-K12V cells and RNSP-K12V tumor cells, respectively. The level of GAPDH was used as an internal control.