Figure 5: Immunoblot of EGFR, ErbB2, ErbB3 and ErbB4 expression in HGG cells after 24 hrs of treatment with CI-1033 or vehicle, with or without 4 Gy of irradiation. Gli-6 cells were pretreated with 5 µM CI-1033, U-251 MG and D384 mMG cells with 8 µM CI-1033.